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Clinical and psychological characteristics of childhood acalculia. What is acalculia? Causes of its occurrence and methods of correction

Dyscalculia is a disorder expressed in a person’s inability to count or make decisions. mathematical problems. Most often this condition manifests itself in preschool and junior school age. Often children suffering from dyscalculia are considered either mentally retarded or lazy, and they are placed in special classes for the retarded. For the further full development and successful education of the child, it is important to carry out timely diagnosis and correction of this disorder.

ICD-10 code

F81.2 Specific arithmetic disorder

Causes of dyscalculia

Dyscalculia in adults manifests itself as a result of a violation normal operation brain Organic lesions of the temporal part of the brain can lead to this disease. This can result from hemorrhages and blood clots, brain tumors and cysts, and traumatic brain injuries.

The development of dyscalculia in an adult requires immediate appeal see a neurologist!

Psychotraumatic factors include:

  1. Fear of mathematics. This psychological factor significantly affects children's ability to count. Perhaps the child has bad memories of learning math when he was unable to solve problems correctly and was punished or scolded for it. In this case, self-doubt and fear of repeated punishment reduces the child’s ability to count.
  2. General violation of the child's psychological health. This disorder is often observed in children raised in dysfunctional families.

Disorders of mental activity that lead to dyscalculia:

  1. Impaired visual processing—children are unable to visualize what is described in the task.
  2. Problems with abstract logical thinking.
  3. Memory problems, inability to learn formulas and rules for solving mathematical problems.
  4. Low concentration.

Symptoms of dyscalculia

Dyscalculia is not only a violation of the ability to count, it is complex disorders mental activity, which are manifested by various symptoms.

  1. The child does not understand what a number is and does not know the names of the numbers.
  2. He does not understand on what principle he is built number series, is not able to determine the place of the number in the sequence.
  3. The child is not able to perform operations with complex numbers and does not understand how to decompose a number into terms.
  4. The child's ability to compare numbers is impaired. He doesn't understand what a higher or lower number means.
  5. Comparisons of the number and size of items are also difficult.
  6. It is difficult for a child to perform arithmetic operations on numbers; he does not understand the meaning of these actions. He is only capable of performing basic arithmetic operations using manual rather than mental arithmetic.
  7. The child does not know the sequence of arithmetic operations and is not able to solve examples of several operations.
  8. He cannot remember the names of numbers and mathematical terms and does not know what they mean.
  9. The child is unable to write numbers correctly.
  10. Due to impaired visualization ability, the child is able to solve problems only if they have an objective component. He is not able to imagine what is described in the problem.

In general, dyscalculia in children manifests itself as an inability to understand and solve mathematical and logical problems. The child is not able to remember and understand the conditions of the problem and develop an algorithm for solving it. Dyscalculia in schoolchildren is often associated with the fact that they are also unable to correctly calculate their time. All this leads to poor performance at school.

Forms

Depending on the pathogenesis, there are the following types of this disease:

  1. Practognostic. The child is unable to count objects, determine how many there are, or compare the numbers of one and another group.
  2. Verbal. The child makes mistakes when he names numbers, the actions that are performed on them, and geometric figures.
  3. Graphic. The child is unable to write down numbers, symbols of mathematical operations, or draw geometric shapes.
  4. Dyslexic. The child makes mistakes when reading numbers and arithmetic signs in the problem statement.
  5. Operating room. It is difficult for a child to perform mathematical operations with numbers or solve simple or complex examples. A child may experience several groups of symptoms. After determining the type of disease, specialists develop therapy aimed at correcting existing disorders and preventing the development of other types of dyscalculia.

Complications and consequences

The consequences and complications of dyscalculia are manifested in the child’s inability to master school curriculum and refusal to further study. The inability to count is accompanied by a weak ability to master the humanities. As a result, such a person is not able to master any profession and experiences difficulties in life.

Differential diagnosis

The first signs of dyscalculia appear in preschool age, when a child first encounters the need to count, and elementary mathematical operations cause him difficulties. If parents have identified such problems in their child, they should contact a speech therapist or child psychologist. Carried out by specialists differential diagnosis type of violation, its causes are identified and a correction method is developed.

For accurate diagnosis The child is asked to perform a series of mathematical operations:

  • count from 10 to 20;
  • compare numbers with each other;
  • arrange the proposed numbers in descending or ascending order;
  • perform basic arithmetic operations on numbers;
  • name and sort different geometric shapes by color and size.

A child’s ability or inability to perform certain groups of mathematical actions allows us to make a clear diagnosis and determine the type of dyscalculia. Further treatment directly depends on this.

Treatment of dyscalculia

Correction of the disorder is carried out in speech therapy centers, as well as in clinics and specialized treatment centers. For effective correction requires joint work of a speech therapist, neurologist and child psychologist. The therapy uses special computer games for children with dyscalculia and interactive classes with a specialist.

Therapeutic games for dyscalculia are aimed at teaching the child to count and perform mathematical operations. He is taught to compare objects, sort them by various characteristics. After the child achieves success in this, you can begin to teach him simple arithmetic operations. At the same time, it is important to ensure that the child understands the logic of the operations performed and the simplest mathematical operations. Then he is taught to decompose a whole object or number into parts and assemble them into a whole.

To correct the disorder, it is very important to develop the child’s literate and rich speech and enrich his vocabulary, including mathematical terms. To begin with, the child must correctly name the numbers and the actions that are performed with them, geometric shapes and their characteristics: color, size. Then the child is taught to correctly use the learned words in colloquial speech. Close attention is paid to written literacy: the ability to correctly write down numbers and mathematical symbols.

In parallel with the correction of inability to count, it is important to carry out general development mental abilities of the child: development of abstract logical thinking, visual memory, spatial orientation, ability to predict, musical abilities. Children are taught self-control and the ability to evaluate and manage their time.

A number of drugs, for example, B vitamins, glycine, cogitum, cortexin, are used to improve dyscalculia. cerebral circulation and activation of higher nervous activity.

Prevention

To prevent violations of the practical-gnostic type, it is recommended to teach children counting skills in preschool age. The child needs to be shown how objects are counted and how simple arithmetic operations are performed. When learning, it is important to pronounce the names of numbers and mathematical operations and accompany this with visualization (show the number of fingers or objects). It is important to develop in a child the ability to correlate a real object and its image. At the same time, the child remembers the names of objects, numbers and arithmetic operations.

To avoid the development of operational dyscalculia, it is important to teach the child the rules of counting and the order of arithmetic operations.

To avoid verbal and dyslexic dyscalculia, it is important to ask your child to say number names and actions, colors, sizes and shapes. geometric shapes, objects. At the same time, the parent must control the correct use of certain words, in soft form correct errors.

To prevent graphic dyscalculia, it is important to develop the child’s visual memory and the ability to recognize and operate with visual images. It is important fine motor skills and coordination of movements, the ability to calculate hand movements based on visual information, for example, to estimate the distance to an object, to have time to grab a moving object.

For the prevention of all types of disease, it is important to develop spatial and abstract logical thinking, all types of memory, competent and clear speech, and clear coordination.

(a + lat. calculo - to count) is presented in the form of a neuropsychological symptom, the peculiarity of which is the loss of the ability to perform arithmetic operations due to lesions of the cerebral cortex. A synonym for acalculia is dyscalculia.

Patients lack the ability to compare numbers, subtract and add them, and solve basic mathematical problems.

  • association of number and its spoken name;
  • comparison of numbers with different numerical values;
  • registering the meaning of a number in the mind and understanding its essence;

The symptoms of acalculia are often a precursor to dementia, the cause of which is the presence of lesions in the frontal or parietal lobe of the brain.

Classification

Acalculia, as a term, was discovered in 1919 by F. Henschen. Research activities about the violation of the synthesis and analysis of computational operations made it possible to distinguish two types of pathology - primary and secondary.

  1. Primary acalculia is the result of disturbances in the temporal, occipital and parietal cortex. The key feature is a violation of the synthesis and analysis of spatial representations. The patient has difficulty performing computational processes and distinguishing numbers. In the vast majority of cases, the patient does not understand the difference between concepts such as front and back, down and up, right and left.
  2. Secondary acalculia is the result of existing syndromes of a neuropsychological nature.

Symptoms

It is in children that the primary form of the pathology in question manifests itself most clearly. By the time a young patient enters school, the parts of the brain responsible for understanding spatial phenomena may not have developed. The result is a challenge in understanding arithmetic operations and the meaning of numbers in the first year. The following symptoms are also observed.

Manifestations of the primary form:

  • the concept of more is less in relation to arithmetic operations is violated;
  • the concept of numbers is missing;
  • arithmetic operations are carried out problematically;
  • the concept of spatial coordinates is violated;
  • there is no difference in the bit structures of numbers;
  • there is no understanding of the difference between numbers if the parietal region is affected;
  • difficulties in evaluating arithmetic objects containing the number zero;
  • figurative perception of a number in the form of an object, for example, 50 roses, 10 hryvnia;
  • occasionally there remains the possibility of addition;
  • serious problems in the process of subtraction, especially if you have to work with numbers separated by ten;
  • Acalculia in this form is rarely combined with speech disorders.

If this pathology is the result of damage to the frontal part of the brain, the patient understands the principle of numerical digits, basic arithmetic calculations are available to him. More complex actions and manipulations cause serious difficulties.

Symptoms secondary form

The secondary form is caused by lesions in the prefrontal, temporal or occipital regions of the brain.

  1. Problems in the occipital region lead to impaired visual perception of numbers. The underlying disease may be optical agnosia or alexia. The patient may not be able to distinguish numbers that are similar in spelling visually; their place value understanding of numbers is retained. Often such problems are accompanied by amnesia for the names of numbers.
  2. A defect in auditory understanding of numbers is observed with damage to the temporal cortex. The main disease is sensory or acoustic-mnestic aphasia.
  3. Problems in the prefrontal area lead to impaired understanding of arithmetic operations. The dominant hemisphere is most often affected. For right-handed people this is left hemisphere, and for left-handed people - right.

Treatment

Acalculia requires therapy based on eliminating the underlying cause. The form of the syndrome directly affects how computational abilities are restored. Responsibility for this lies with clinical psychologists, speech pathologists, neuropsychologists and psychiatrists.

Therapy of the primary form

In this case, the key goal is to restore understanding of numbers and their place value structure. Among the most effective methods the following:

  • method of understanding digits;
  • method of working with numbers;
  • visual method.

Special techniques based on visual memory are usually used in severe forms of the disease. These can be cards laid out in a row in front of the patient with the image of the number of objects and the corresponding numbers.

The game form in the case of children brings a more tangible effect. For example, under the number 4 there will be 4 books on the card.

The color scheme of objects should be bright and varied, since color plays an important role in the process of memorization and perception.

The essence of the method of working with numbers is the need for the patient to break any number into the maximum possible variations. Sticks are great for this exercise. For example, the patient is asked to break the number 7 into possible variations.

All completed actions must be recorded in a diary. Over time, the sticks can be disposed of and replaced with verbal commentary on the arithmetic operation if the patient makes progress. All counting operations will need to be spoken out loud, then you can switch to a whisper, and as a result, the person learns to count in his head.

If the inability to analyze the digits of numbers is accompanied by a violation of their names, it is important to pronounce all numbers up to 100, and the work of the speech pathologist will be to identify the difference between ones and tens.

An equally effective exercise is when the patient needs to write the name of the number under its name. For example, under the inscription three hundred and forty-seven, the patient should write 347.

Only the first 2-3 lessons are conducted in a visual-figurative style, after which a gradual transition to vocal voicing of processes is relevant. In adults, acalculia mild stage corrected more effectively than in children.

Treatment of the secondary form of acalculia

In the secondary form, the location of the brain lesion directly affects the nature of the recovery of numerical concepts and counting.

  1. Occipital lesions require correction of correct spelling and visual perception. Most effective techniques– exercise with motor imagery of numbers, manipulation with problems and numbers, as well as object counting. The method of voicing is no less effective, when the patient imagines a number in his mind. The result is possible with well-developed visual memory, imagination, and also with intact auditory perception.
  2. Problems with auditory perception of numbers are typical when the temporal zones are affected. Specialized therapeutic restoration in this case is not relevant, since the violation is insignificant.
  3. Prefrontal lesions require patients to be taught a simple understanding of numbers; arithmetic operations are gradually introduced, where numbers act as objects. At the final stage, the defectologist introduces arithmetic operations with sequential actions.

The patient will analyze arithmetic operations both through an objective digit understanding of numbers and through habitual object characteristics, if manipulation of objects is introduced along with numbers.

You can move from the primary subject assessment to a digit, spatial characteristic by switching to the internal program of consciousness from external actions. Gradually, arithmetic manipulations are restored, as is their understanding.

Acalculia refers to diseases resulting from damage to certain areas of the cerebral cortex. A feature of the disease is impaired ability to perform computations, lack of understanding of the bit structure of numbers and arithmetic operations.

Patients often confuse visually similar numbers, for example, 416 and 614, and have difficulty counting. Depending on the type, the disease can act as a single symptom or be part of the structure of neuropsychological syndromes. Often the disease develops due to traumatic brain injury.

Neuropsychological aspects of the syndrome

The disease was first mentioned by psychiatrist F. Henschen in 1919. Thanks to his research on violations of the analysis and synthesis of computational operations, the scientist identified two main types of acalculia:

  • primary;
  • secondary.

The primary form of the syndrome is observed when the parietal, occipital and temporal areas of the cortex are affected. A feature of this type of disease is a violation of the analysis and synthesis of spatial representations. It becomes quite difficult for the patient to distinguish numbers and carry out computational manipulations with them. An interesting fact is that violation of counting operations is often combined with a lack of understanding of the differences between “left” and “right”, “up” and “down”, “behind” and “in front”.

The most significant disturbances in the primary form of the syndrome are observed in children. The formation of the parts of the brain responsible for the concept of space may not occur by the time the child enters school. In such cases, in the first year of study, difficulties may arise in understanding numbers and arithmetic operations.

The main symptoms of the primary form of the disease:

  • lack of understanding of the difference between numbers, for example, the numbers 245 and 254 seem the same to the patient;
  • inability to distinguish place value structures of numbers;
  • violation of the concept of spatial coordinates;
  • difficulties with arithmetic operations;
  • lack of concept of numbers;
  • violation of the concept of “more” - “less”.

When the parietal region is damaged, difficulties are observed in analyzing the differences between numbers. It is quite difficult for patients to evaluate numbers that contain the number “zero”, for example, they understand 2050 as 250. They also have difficulties with the concept of which number is greater and which is less, so 300 may be less than 500. The primary form of the disease leads to a violation objective digit assessment of numbers. The patient perceives a number in the form of an object, for example, 10 houses, 50 kopecks, etc. With this disease, the understanding of all computational operations suffers; only in rare cases does adding numbers remain possible. The most difficult task for patients is to perform the subtraction operation, especially if the numbers differ from each other by tens. Sometimes the primary form of acalculia occurs in combination with speech impairment.

When the frontal region of the brain is damaged, patients are able to perform basic arithmetic calculations and understand the principle of number digits. However, certain difficulties arise when manipulating more complex numbers and actions.

The secondary form of the disease occurs against the background of already existing neuropsychological syndromes. This form acalculia is associated with lesions the following departments brain:

  • occipital;
  • temporal;
  • prefrontal.

When the occipital region is affected, a disturbance in the visual perception of numbers is observed; as a rule, the secondary form of the disease occurs against the background of alexia and optical agnosia. The patient cannot visually distinguish numbers with similar spellings, although the place value concept of numbers is often intact. Quite often, this syndrome occurs in combination with amnesia for the names of numbers.

If the temporal region of the cerebral cortex is affected, the patient has a defect auditory perception numbers. Mainly found in acoustic-mnestic and. Damage to the prefrontal areas indicates impairment in the understanding of arithmetic operations. This syndrome is usually observed when the dominant hemisphere of the brain is affected. For left-handed people, the right hemisphere is dominant, for right-handed people, the left hemisphere is dominant.

Restoring the concepts of number and counting in patients with acalculia

Therapy for the syndrome should be aimed primarily at eliminating the underlying disease (trauma, tumor). Restoration of computing abilities is carried out depending on the form of the syndrome. The disease is treated by psychiatrists, neuropsychologists, defectologists, and clinical psychologists.

The main goal of therapy for the primary form of the syndrome is to restore the concept of number and its digit structure. Let's consider the main methods of training and rehabilitation of patients:

  • visual method;
  • method of working with numbers;
  • a method of understanding the digits of numbers.

IN severe forms diseases are used special methods learning based on visual memory. So, for example, cards with numbers and images of objects corresponding in number are laid out in a row in front of the patient. For children, for greater effectiveness, this method can be carried out in game form. So, for example, the card shows the number 2, and under it there are two balls; preferably, all objects should be bright and varied in color, since color plays a big role in perception and memory.

The method of working with numbers is based on the fact that the patient needs to break any number into all possible variations. This exercise is carried out using chopsticks: the patient is told a number and asked to break it down into numbers; all manipulations are recorded in a diary. Thus, the patient is asked to break the number 5 into all possible variations using sticks: 1 p. + + 4 p. = 5; 2p. + 3p. = 5p. etc. If over time the patient begins to make progress, verbal commentary on arithmetic operations is used instead of sticks. In other words, all counting operations are spoken out loud, then in a whisper, and so the patient is led to try to count in his head.

Often, difficulties with analyzing the digits of numbers occur in combination with a violation of their names. All numbers up to 100 are spoken out to patients, thereby the defectologist explains the difference between tens and ones. Special exercises are also used in which the patient must write the names of numbers under the words, so under the word “two hundred forty-five” you need to write “245”, etc.

The visual-figurative nature of the classes is carried out 2 to 3 times, then patients gradually switch to vocal voicing of computational operations. As a rule, mild stages of acalculia in adult patients are easier to correct than in children.

Restoration of counting and numerical concepts in secondary forms of the syndrome depends on the location of the brain lesion.

For occipital lesions of the secondary form of the disease, correction should be aimed at the visual features of numbers, correct spelling. Among the main methods used: subject counting, manipulation with numbers and tasks, exercise with motor image of number, etc. The method of voicing numbers is quite effective, in which the patient must imagine the number in his mind; this exercise relies on intact auditory perception, imagination and visual memory.

When the temporal regions are damaged, there is a decrease in the auditory perception of numbers, which is not such a significant disorder and often does not require specialized therapeutic recovery.

Patients with prefrontal lesions initially learn a simple understanding of numbers, gradually moving on to arithmetic exercises where numbers act as objects. Next, the defectologist transfers the patient to arithmetic examples with sequential actions.

Manipulating objects along with numbers allows the patient to analyze arithmetic operations not only with the help of the usual object characteristics, but also with an objective digit understanding of number. Thus, with the help of interiorization, that is, the transition from external actions to the internal program of consciousness, the patient moves from the primary objective assessment to a spatial, categorical characteristic. Gradual learning promotes effective recovery understanding and manipulating numbers.

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Modern man, due to various circumstances, often suffers from various mental disorders. According to statistics, approximately 35% of Europeans have such disorders. This may be not just widespread depression, but also a more rare pathology - acalculia (loss of a person’s ability to count). The problem is indeed incredibly serious, but it can be solved.

We’ll talk more about what acalculia is and how to get rid of it in this article.

Why is acalculia confused with dyscalculia?

Acalculia and dyscalculia should not be confused, although they are very similar neuropsychiatric diseases. Their main difference is in the causes of the disorders.

The first syndrome is acquired as a consequence of other brain injuries, and the second is congenital.

In addition, acalculia can be partial, and dyscalculia is complete absence ability to study even the simplest arithmetic, because a person does not have the function of estimating the number of objects. The manifestation of dyscalculia is observed in 5% of first-graders. With the help of special techniques you can successfully get rid of it.

Causes of the syndrome

The cause may be failure different parts cerebral cortex: traumatic brain injury, neurological pathologies, infections, intoxications, neoplasms.

Because of this, cognitive processes are disrupted. Very rarely, the syndrome is inherited or appears as a result of the influence of a negative social environment.

Types of disease

Depending on the manifestation, there are many types of acalculia.

Verbal

Characterized by difficulties in denoting mathematical terms, concepts and operations verbally. It is quite possible that the patient is fluent in arithmetic, but cannot express it.

Apraxic

A person is not able to independently determine the number of objects that are nearby.

Dyslexic

It manifests itself in the fact that the patient suffers defeats in attempts to read some arithmetic sign or symbol. It is believed that this type disorders can be transmitted at the genetic level.

Graphic

In this case, the name speaks for itself; graphic acalculia deprives a person of the ability to display mathematical operations in writing. Such a person will not even be able to draw a basic geometric figure.

operating room

During the operational type of disorder, it will be almost impossible for the patient to perform arithmetic operations: add, subtract, divide and multiply. Perhaps this will manifest itself partially. For example, a person copes well with subtracting numbers, but cannot multiply them.

Primary

Scientists believe that the disease of primary acalculia has no connection with disorders of other mental functions. It appears due to damage to the left hemisphere different zones cerebral cortex: frontal or parietal.

Frontal

Impaired functioning of the frontal lobes of the brain leads to loss of conscious activity in a person. Thus, the individual cannot perform precise mathematical operations.

Parietal

Occurs as a loss of spatial thinking. Accordingly, the patient cannot understand the concept of “numbers” and everything connected with them.

Secondary

It is part of a neuropsychiatric syndrome that already exists in the individual. It appears as a result of a lack of ability for purposeful mental functions. Secondary acalculia has several subspecies.

Optical

A variety that appears due to problems with vision receptors. The patient literally cannot distinguish one number from another.

Sensory

As a consequence of problems with the temporal areas of the cerebral cortex, sensory acalculia develops. Because of this, the patient loses the ability to count verbally.

Acoustic-mnemonic

If the prefrontal areas of the brain are affected, then an acoustic-mnemonic type of disorder may begin. It is expressed in the fact that the person cannot perceive any arithmetic terms or commands by ear.

Symptoms of acalculia

  • Problems recognizing numbers that are externally similar or the number “0”;
  • inability to independently perform arithmetic calculations;
  • violations in understanding what a number is and its rank;
  • difficulties in perceiving mathematical information aurally/visually;
  • inability to reproduce numbers/operations verbally.

Features of acalculia in children

In children, most often, it is the primary type of acalculia that is observed. This happens between the ages of 5 and 11 years.

The child does not perceive any arithmetic information that they try to convey to him at school. He does not understand how it is possible to carry out any operations with incomprehensible signs, calling them numbers.

Neuropsychiatric disorders can lead to the fact that the baby will not be able to distinguish between “left” and “right”.

Usually this disease is treated up to 12 years of age.

Diagnosis of the syndrome

If you suspect the appearance of acalculia, you should urgently contact a psychologist, speech pathologist or neurologist. The doctor will conduct an examination; if clinical symptoms are detected, an additional examination will be prescribed. These are tests for counting, speech, and writing. If the results are very low, the diagnosis will be confirmed.

Treatment method

The technique depends on the stage of acalculia, its type and, of course, the age of the patient.

In adults

Correction of the syndrome in a sexually mature person may include classes with a specialist and various computer programs. The doctor will gradually lead the patient to understand the concept of “number”. After this, he will be taught mathematical operations: from the simplest to the more complex. Regular exercise will lead to good results. For auditory problems with number perception, there is no need for a special technique.

In children

I often use visualization. Restoring the counting function is carried out using various pictures, drawings, and arithmetic sticks. The main thing is that the baby is interested and perceives it as a game.

What complications can the syndrome cause?

The manifestation of acalculia syndrome significantly inhibits personality development. She becomes poorly trained, because she perceives the material worse. A specialist with this syndrome quickly loses his qualifications. In addition, having such a disease, many feel inferior. This is where mental disorders appear.

This section briefly describes two other forms of nonspecific acalculia - sensory and acoustic-mnestic. If optical acalculia occurs in the syndrome of disturbances in the process of optical perception, then these two forms of counting disorders occur in the syndrome of disturbances in acoustic perception and speech. Therefore, one of them can be conditionally called "auditory acalculia", in which only the oral form of counting and counting by ear is violated, and the other - "amnestic acalculia"- associated with impairment of auditory-speech memory and the volume of auditory perception.

Damage (or underdevelopment in children) of the superior temporal gyrus (Wernicke's 22nd area) is known to lead to sensory aphasia, which is based on impaired phonemic hearing. ...

Impairments in phonemic hearing, oral expressive and impressive speech in patients with sensory aphasia also lead to impaired understanding of words denoting numbers and numbers, and their recognition. Instead of the sounding number “six”, patients can hear the word “seven”, instead of “sixteen” - “seventeen”, instead of “nine” - “ten”, etc. The same and other difficulties arise when naming, and all this leads to great difficulties in counting operations, in their understanding and implementation. These defects are not a violation of the account, they only complicate it, and they can be overcome if the account and counting operations are transferred to internal operations- without the participation of speech, and even better if we exclude internal speech. As for children, in them these defects in the temporal region and unformed speech lead to gross primary violations of counting, counting operations and the formation of the concept of number. In this case, other methods of examining and restoring the account are necessary.

Thus, sensory acalculia has the following characteristics:

clinical picture- patients do not understand by ear the meaning of numbers and numbers; they make many attempts to perform oral arithmetic operations, but all of them are unsuccessful;

neuropsychological picture- sensory acalculia occurs in the syndrome of sensory aphasia, agraphia, alexia (symptoms - impaired understanding of numbers by ear, naming numbers due to speech defects; factor- violation of acoustic perception and, above all, phonemic hearing);

psychological picture- in this case, a violation of counting leads to a violation of speech, but primarily counting, the concept of number and counting operations are not impaired.

This form of counting disorder is also nonspecific, secondary, and counting defects are associated with disorders of speech and acoustic perception and occur in the syndrome of acoustic-mnestic aphasia, the main mechanisms (factors) of which are defects in the volume of acoustic perception and disturbance of object images and representations. This form of acalculia is poorly understood and needs further understanding. The fact is that with this form of acalculia there were often symptoms of failure to recognize numbers presented in loud noise or in large quantities simultaneously for their consistent recognition and naming, i.e. Symptoms of secondary agnosia and, as it were, amnesia for the name of a figure or number arose. Under these sensitized conditions, perceptual difficulties, defects in perception, recognition and naming of numbers arose, due to defects in image representations and the volume of perception. When asked to quickly write a series of figures or numbers, patients also made many mistakes, completed the task slowly and highest degree arbitrarily and consciously, they tried to name what they wrote, as if helping themselves with speech.

Clinical picture. When asked to name a number or perform an arithmetic operation, patients perform everything extremely consciously and slowly, are constantly asked to repeat the numbers or the task itself, often refuse to complete the task, and become upset.

Neuropsychological picture. This acalculia is of secondary origin and occurs in the syndrome of a very specific acoustic-mnestic aphasia, which is characterized by a violation of the volume of acoustic perception, the replacement of simultaneous perception with a successive one, a violation of image-representations, which leads to naming defects. All these symptoms also manifest themselves in acalculia: the volume of perception of the named number is reduced, patients require repetition of the number in parts, the images (perception and representation) of numbers are also defective - patients cannot isolate the essential features of similar numbers and figures.

Factors - a decrease in the volume of acoustic perception, a violation of the visual image of numbers due to defects in the speech organization of perception.

2.3. Frontal acalculia... Neuropsychological analysis of counting disorders in lesions frontal systems brain

The frontal region of the cerebral cortex occupies more than a third of the total mass of the cortex in humans. Along with the inferior parietal region, the frontal lobes are the most complex and historically the newest formation of the cerebral hemispheres. This area differs from others in that it has the finest structure and the most diverse and numerous systems of connections with other areas of the brain. They mature later than other parts of the brain and represent special zones, the way they work and functions are also very different from all other areas of the brain.

... Damage to the frontal lobes of the brain leads to changes in a person’s mental activity, to behavioral disturbances, which in some cases manifests itself in a decrease in activity, and in others in a tendency to impulsive, uncontrolled acts. These disturbances also affect the course of intellectual activity.

Counting, as one of the types of ID, is impaired when the frontal lobes of the brain are damaged. In the literature, there is often an opinion that with these brain lesions a nonspecific, secondary disorder of counting occurs. Our experimental data give grounds to consider “frontal acalculia” a much more complex disorder, in which both primary and secondary counting disorders occur, and this depends on the factors (mechanisms) that underlie each variant of the frontal syndrome. Therefore, “frontal acalculia” cannot be attributed entirely to the nonspecific forms that we described above. Here we encounter a complex “knot” of counting violation, which occurs as a violation of ID.

... In patients with “frontal syndrome,” the concept of number is impaired due to defects in understanding the abstract and generalized essence of number, impaired understanding of the meaning of numbers, the meaning and meaning of zero in the structure of a number and in numerical operations. These disorders occur against the background of the primary preservation of the positional-bit principle of number construction, based on the intactness of spatial perception in these patients.

Patients in this group retain intact recognition and naming of simple numbers, and the processes of automated counting (multiplication tables, addition and subtraction within one ten, etc.) are preserved. Number and counting operations are violated in them as purposeful selective activity; these violations are manifested in the instability of the task, in defects in active orientation-research activity, in the creation of a program of activity and action, in the simplification of the program of action (sometimes in inert stereotypes) and, finally, in the violation of comparison of the effect with the initial data, i.e. in violation of control. These calculation defects are detected primarily in solving arithmetic examples, consisting of several links and requiring a sequence of operations, holding intermediate results, and comparing the results obtained with the original data. Violation of these components of ID leads to disruption of counting function with complete preservation of visual, acoustic and spatial gnosis, as well as speech.

A completely different picture of counting disorders is revealed in case of defeat basal and medio-basal parts of the frontal lobes of the brain, which is known to lead to significant changes emotional sphere behavior of the patient, without greatly affecting the course of his intellectual processes. ID defects arise based on impulsiveness and manifest themselves in a violation of the orienting basis of action due to a decrease in attention. There are no primary violations of either counting operations and actions with numbers, or the concept of number. Errors arise due to a disruption in the dynamics of nervous and mental processes in the direction of their acceleration, impulsiveness, and due to defects in inhibitory processes. Patients in this group retain the recognition and naming of simple numbers, and the processes of automated counting (multiplication tables, addition and subtraction within one ten, etc.) are preserved.

In case of defeat posterior frontal brain systems counting disorders usually occur in a syndrome of pronounced speech and motor perseverations, which are the result of a violation dynamics of mental processes, inertia of their course. And, finally, ID disorders and, in particular, counting disorders can arise in the syndrome of damage to the posterior frontal parts of the brain (and primarily to the posterior frontal parts of the leading hemisphere). Operations for solving intellectual problems can acquire a disautomated, detailed character here. Damage to this part of the brain leads to increased inertia of emerging stereotypes, which complicate the flow of thinking. In cases of massive lesions in this area, all these phenomena of deautomation, inertia of stereotypes, and inactivity manifest themselves especially clearly in speech sphere, which makes ID even more difficult: the patient deforms the task, perseverates the data (numbers, name of the action, etc.). These counting defects, which most often occur together with efferent motor aphasia, do not affect the counting structure, however, perseverations and echolalia make it difficult to carry out this function and can sometimes lead to gross disturbances in numerical operations.

The described “frontal” syndromes cause specific violations of counting and counting operations. Counting disorders in patients with different variants of frontal syndrome manifest themselves in different forms, but it is typical for all of them primary violation of the concept of number(structure of number and its bit structure) and counting arithmetic operations, but for different reasons, in contrast to parietal acalculia. This is especially true for damage to the polar parts of the frontal zone of the brain. Patients in this group can formally compose the number given to them from combinations of other numbers, but when organizing their activities from the outside, they can also decompose the number into a number of combinations of other numbers (cf. 15 = 5 and 10; 10 and 5; 9 and 6; 6 and 9; 7 and 8, etc.), they can read multi-digit numbers, but also when organizing their actions.

Given the formal possibility of performing these operations with numbers in this group of patients violated not only the organization and management of activities, but also understanding the meaning of the interaction of numbers, their internal composition, the systematic nature of the number. And this is a primary violation of counting, but it is based on other mechanisms, in contrast to parietal acalculia: 1) violation understanding the meaning and meaning numbers; 2) violation of the activity itself: the indicative link, the planning and control link; 3) violation of the regulatory function of speech. Counting operations are also not initially preserved in these patients: they do not understand the essence of arithmetic operations, the system of mathematical relations between numbers. They have no difficulties in spatial counting schemes, but their understanding and comprehension of these operations is impaired. Counting violations here are of a heterogeneous nature: in some cases they are based on phenomena of inertia of stereotypes and perseveration, inactivity in the course of higher mental processes; in others - impaired attention and impulsivity; thirdly - The main factor in the calculation defects may be a gross violation of the motivational side of the activity, instability of goals and intentions. The general picture of counting disorders in this group of patients is as follows.

When performing tasks to compose a given number from various combinations of other numbers, some patients (with damage to the posterior frontal regions), as a rule, name a limited number of possible combinations of numbers. ...

A slightly different picture of counting violations opens up to us in the event of a defeat. basal sections frontal systems. In this case, counting defects proceed much smoother and are easier to overcome. The cause of defects in this case is a violation of orientation in a task, failure to retain a task, etc., resulting from impulsiveness and instability of attention. The counting process in this case is not significantly disrupted...

In this case, the calculation is disrupted for the second time due to defects in the dynamics of the process. At the psychological level, this defect manifests itself in symptoms of a violation of general behavior and activity: in impulsive uncontrolled actions, in violation of the programming of activities and its purposefulness, etc. However, these symptoms are secondary, they are not associated with a primary disorder of ID, as we saw in patients with the lesion prefrontal convexital regions of the frontal areas of the brain. Here it is necessary to control the dynamics of the process, restore the inhibition of impulsive actions, and this will be enough to obtain the correct course of the counting process. Elementary assistance from the teacher, aimed at strengthening the patient’s orientation in the task conditions, as well as transferring the process to the level of awareness, lead to the correct execution of counting operations.

Damage to the posterior frontal parts of the brain leads to disruption of the dynamics of mental processes, manifested in pathological inertia of once established stereotypes, switching defects, and perseverations...

Counting defects are especially clearly detected when performing tasks that take place under conditions of maximum mobility of computational operations, for example, in a task where the patient is required to sequentially subtract from 100 by 7 or add 7 by 7, starting from 5. The difficulties of this operation lie primarily in that the account here is subject to internal conditions, which represent a constantly changing dynamic field.

We see a difference in the clinical, neuropsychological and psychological pictures of counting disorders when different areas of the frontal systems are affected. Naturally, the methods for restoring counting in prefrontal, basal and posterior frontal syndromes will be different. They will also differ from recovery methods for other forms of acalculia, since in all these cases there are different mechanisms (factors) for the violation of counting.

Let's briefly summarize. Lesions of the frontal areas of the brain lead, in the same way as lesions of the parieto-occipital regions, to a violation of counting and numerical operations. In contrast to existing ideas about a secondary violation of counting when the frontal areas of the brain are damaged, our study allows us to conclude that when the frontal systems of the brain are damaged, there is a primary violation of counting - the concepts of number and counting operations. This defect manifests itself especially clearly when lesions of the prefrontal convexital regions. In this case, the semantic component of counting, understanding of the structure of a number, and the dependence of the value of a number on the positional principle are disrupted. All these defects occur in the syndrome of personality disorder, motivation, on the one hand, and the collapse of the ID structure, on the other. With this syndrome, orientational research and search activity is grossly disrupted, replaced by familiar patterns, and planning of counting activities is also disrupted. All activities of patients in this case are unfocused, unregulated and uncontrollable. In this syndrome, defects arise in the concept of number, its composition, understanding of the interaction of numbers within one number and understanding of the essence of arithmetic signs and operations with them. Let us briefly clarify the clinical and neuropsychological picture of counting disorders in different options"frontal" acalculia.

In the clinical picture violations, counting defects appear in some cases in impulsive actions sick, in others - in slowness and difficulties in switching from one type of action to another, in the third option

In “field behavior” that has nothing to do with the task (for example, the task is to solve the arithmetic example 9 + 5 =; the patient looks around and says: “Ah, that means 9 chairs, but there aren’t nine here... one, two, three... just three"). Children with insufficient function of the frontal lobes are also distracted from the task: they begin to draw or get up and walk around the room, etc. All behavior in the situation of performing a task is inadequate; patients are uncritical of their actions.

Neuropsychological picture violations. Counting disorders occur in the syndrome of disruption of activity, its purposefulness, regulation, control, disturbance of motives and needs for behavior in the absence of organization of activity and destruction of the regulatory role of speech. Factor

- violation of selectivity and focus of activity. Symptoms: a) lack of ability to independently act with numbers, without external control; b) lack of understanding of the relationship between numbers within the composition of a number; c) narrowing the scope of number connections, i.e. decreased generalization and violation of the concept of number; d) violation of accounting operations; e) loss of intermediate links in counting operations; f) emergence of side connections; g) perseveration. Recognition and naming of numbers and simple numbers, multiplication tables, addition and subtraction within the first ten, and automated operations are preserved.

Psychological picture counting disorders with damage to the frontal areas of the brain are, first of all, characterized by a violation of the voluntary level of this process. The involuntary level of counting, especially numerical operations, is often preserved, which often leads to an erroneous conclusion about the preservation of the ability to count and counting operations in these patients, while in fact, as our experimental data show, only skills are preserved; conscious and meaningful actions with numbers are grossly violated.

Methods of restorative learning to count in cases of damage to the frontal systems of the brain

In the field of problems of restoring human mental activity, methods for restoring higher mental functions, including counting, in patients with damage or dysfunction of the frontal lobes of the brain are the least developed. This equally applies to the state of methods for restoring HMF in children with underdevelopment (delayed maturation, etc.) of the frontal systems of the brain. This is especially true for children's acalculia. This area of ​​restorative learning needs theoretical and experimental study.

Here we will describe the methods that we developed through experiment and have undergone extensive practice. Our methods meet a number of requirements and conditions. The first and most important requirement to the methods of rehabilitation training for patients with frontal syndrome is their influence on the organization of the general behavior of patients and behavior in a training situation. Second requirement refers to the correct setting of tasks for remedial training. Third requirement involves the use of methods adequate to the structure and mechanism of acalculia, and fourth appeals to the content of the methods, their psychological essence.

The practice of teaching this group of patients has shown that the most effective direction in these cases is programming activities of patients, which is also the leading method. The psychological essence of this method lies in the fact that the program: a) divides the integral action into its constituent operations; b) brings this structure of action outside; c) makes the action voluntary and conscious.

First condition restorative learning appeals to personalities the patient and his emotional-volitional sphere. This means that all types of work, solving any problems and tasks must begin with establishing contact with the patient, from clarifying (and creating) the interests of patients, the system of their relationships, from creating motive of activity and its understanding by the patient. Second condition assumes skillful use of speech - the patient’s own speech and the teacher’s speech. In some cases, speech acts as an organizer and regulator of the patient’s activity (and later as a means of self-regulation), in other cases, speech records the completion of a task and connects speech with the actions of patients. But in some cases, namely in cases of damage to the posterior frontal zones of the cerebral cortex of the right and left hemispheres, as well as the mediobasal regions, speech may be a hindrance, and work must be carried out with speech turned off.

In modern psychology, thinking is considered in close connection with action, and vice versa. “At every step in life we ​​see the transition of thought into action and action into thought. These systems are not isolated from each other” 1. An action refracted through the prism of thought is a different action, meaningful, conscious. This is different highest level implementation of the action. It is this level in the structure of ID and, in particular, in counting that is disrupted when the frontal systems are damaged. As we saw above, this factor underlies frontal acalculia, which should be taken into account in remedial training.

Objectives of rehabilitation training for this group of patients:

1. Restoration of the processes of understanding as an integral part of thinking.

2. Restoring not formal operations and actions with numbers, but conscious and meaningful ones.

3. Restoring the connection between thought and action (and action and thought).

4. Restoring not isolated actions and operations with numbers, but system ones, i.e. restoration of understanding of the integrity of an arithmetic operation and the connection of operations with each other in the structure of an arithmetic operation. For example, in action 35-17: a) 17+3=20, b) 35-20=15 c) 15+3=18 - all operations, the sequential execution of which leads to the solution of the task, are interconnected and represent a holistic formation or “ system of operations."

5. Restoring understanding meaning and meaning numbers.

Before you start working on actually restoring your account, you should work over the organization of the patient's behavior, using for this purpose not numerical material, but picture, verbal, and then only numerical.

Methods for organizing the behavior and activities of patients are numerous and varied; we will describe some of them. Picture classification method(and words): a) according to given characteristics, b) free classification. Nonverbal method of oppositions(opposites): the patient is given a picture (rain, night, etc.), he needs to find a picture with the opposite meaning. Verbal method of antonym words: The patient’s task is to find antonyms for a given series of words (for example, fat - ...; smart -...; rainy - ...; sit - ... etc.).

A method of organizing, distributing and concentrating attention. Method procedure:

1. Patients are offered one stack of cards on which numbers from 1 to 10 are written and a classification task: a) put even numbers to the left, odd numbers to the right; b) put 2 odd numbers and 2 even numbers to the left.

2. Then another stack of cards is offered, on which the numbers of the second and third tens are written (11, 12, 13, etc., 21, 22, 23, etc.) and a number of tasks are given for various types of classification of these numbers For example, a) put the numbers of the 2nd ten to the left, and the 3rd to the right; b) alternately put one number from the 2nd ten, the next from the 3rd, etc. c) find and put the numbers 11; and 21, say how these numbers differ, etc.

3. Schulte table. This table allows you to carry out a variety of exercises for patients with numbers. For example, a) find and consistently show numbers from 1 to 25 (children from 1 to 10 or 15) and, conversely, from 25 to 1; b) find and show even numbers; c) find and show odd numbers; d) show all numbers that are greater (less than) 10, etc.

All these and a number of other similar methods and techniques contribute to:

Organization of patient behavior;

Restoring voluntary understanding;

Inhibition of impulsive actions;

Intensification of activities;

Programming activities;

Restoring awareness of one's own actions.

In children, these methods also work to restore knowledge of numbers and their sequential series. All these methods and exercises are used on / stages training and are aimed at updating (disinhibition) general knowledge about the number.

OnIIstages You can move on to solving special problems of counting restoration and, above all, to restoring an understanding of the composition of a number and the relationship between numbers. In this case it is good to use method of programmed remedial training number of patients. As a material, you can again use the Schulte table and numbers written on cardboard cards, and as techniques - the actions of addition and subtraction. ...

After working together on the first written program, an attempt is made to transfer the patient to work with the program using loud spoken language, reproducing and performing operations from memory, and in the end - at the level of internal speech, i.e. "to myself." After this, they move on to the next program, which solves other problems. Instructions: I will read, and you listen carefully, and then complete the task I read, then repeat the task and complete it again. Below we describe several programs for number operations.

Program No. 1

1. Show the first two numbers in the table (1 and 2).

2. Write them down in your notebook.

3. Add them up (1+2) and write down the sum.

4. Show the next two numbers (3 and 4).

5. Write them down in your notebook.

6. Add them up and write down the sum.

7. Continue working until number 10.

Program No. 2

1. Look at the first sum written down (3) and at the table of numbers; tell me from what numbers this amount was obtained.

2. Perform this action again: add these numbers and write

write the amount.

3. Look at the following sum (7) and also say,

What numbers did the number 7 come from?

4. Perform this action again: add these numbers and write

write the amount. Etc.

After working on these programs multiple times, and making sure that patients understand and are aware of the actions, you can move on to the next program.

Program No. 3

1. Write down from which numbers you got the number 3. Write it down. Perform the addition action.

2. Write what other numbers this number can be obtained from. Now fold it.

3. Write down from which numbers you got the number 7. Write it down, and now add it up. Etc.

After prolonged work with materialized visual supports (tables, cards with numbers, etc.), you need to gradually move on to working in terms of oral speech and always with the numbers that you have already worked with in previous programs. ...

In one stack of cards in the patient’s field of vision there are numbers from 1 to 10, in the other - from 10 and beyond. The patient is given the task of making up the number 25 and finding the necessary numbers for this. A sample is given: 5=3 and 2; 4 and 1; 1, 1, 1, 1, 1. The task is to find the composition of other numbers. It is necessary to work a lot and for a long time with variant techniques with numbers to restore the understanding of number, its composition and the interaction of numbers. ...

Method for analyzing the bit structure of a number. The work begins with the numbers of the 2nd ten. In front of the patient there should be cards with numbers from 1 to 9 and cards with numbers of the second ten (11, 12, 13, 14, etc.) and a program. The program should be written in large letters, highlighting the main words indicating the operation to be performed. ...

After long-term cooperation with the patient, the teacher transfers the patient to independent activity, in which he must strictly carry out all the operations of the program. Subsequently, the programs are assimilated by the patient, reduced in the number of operations, many of which are eliminated (that is, they are already performed “in the mind” and are automated). Similar work is carried out on all categories and classes with a gradual transition to them.

Rehabilitation education for children is carried out according to the same programs (or their variants), but the program is read by a teacher, sequentially giving a task (operation) to the child, explaining it. It's good to give all this work game character, and it is better to work not individually with each child, but with a group (2-3 people). It is useful to use methods such as competition method, assistance method one child to another, cross-check method(when each participant checks his work and the work of other group members). Bit grid method is used to restore understanding of the role of zero in a number, understanding its quantitative essence - zero means the absence of something (some digit). Long-term work with the digit grid, the placement of zero in different digits with the same digit and with different digits helps to restore understanding of its place and role in the number.

For younger children (senior preschoolers and junior schoolchildren), it is good to use another method first - specific quantity transfer method objects into an abstract number by playing with objects and the numbers that represent them. For this, 2 matchboxes are given (later 3, etc.); in the first of them there are always 10 matches (or buttons, etc.), and in the other the number of matches changes - sometimes one, then five, etc. The number 1 is pasted on the first box, and cards with different numbers are placed on the other box each time. First, the child must open the box, look at its contents, count the matches, feel them and close the box. After this action, the child already knows what and how much is in this box (10 matches) and that we denote this quantity with the number 1. This means that here 1 = 10. To this box we add a second box, on which is written 5, then 3, etc. units, and the child must name the numbers obtained by folding the boxes. First the work goes conjugate with the teacher, then conjugate-reflected and at the end reflected and independently. After working for a long time using this method, you can move on to working with the bit table, i.e. from the material form of work to that materialized in the form of diagrams. These methods form in the child the concept of number - its composition and digit capacity, understanding of the dependence of the number on its place in the digit grid (table). ...

Igroup of methods. Classification method(its different variants) - directed and free classification based on verbal and non-verbal (picture) material; analogy search method- “The fourth wheel.”

IIgroup of methods. These methods relate to the restoration of the activity planning process: retelling method story pictures and texts, planning method to the retelling, essay planning method(oral and written), method of series of plot pictures(laying out, telling a story, making a plan), story writing method as specified and own plan etc.

These and a number of other methods, described in detail by us in other works, precede the beginning of account restoration, and then are used in parallel with the work of account restoration.

A smooth transition from this group of methods is method for solving arithmetic problems. In this method, firstly, the condition of the problem (its content) is the semantic background for working with numbers. Secondly, the numbers in the problem are objectified. This is good for restoring understanding of concrete numbers and can serve as a transition to restoring symbolic activity with abstract numbers. This method should be used with gradual complication, ...

. Psychological essence This method is that in an arithmetic problem the numbers are in a semantic context, represent quantitative characteristics of objects(objects, phenomena) and are inextricably linked with the subject. This type of everyday experience is reinforced and occurs on an involuntary level. The method of translating an arithmetic problem into arithmetic operations (examples) is a series of programs consisting of sequential operations. Work according to the programs is first performed by the patient in collaboration with the teacher, and later independently.

Program No. 1

Instructions: You will solve the problem, but first gradually read the program and complete each task.

1. Read the problem.

2. Repeat it.

3. Tell me how many (apples)... were in the problem

4. Tell me how many (pears)... there were.

5. Say what you need to know.

6. Write down the condition of the problem - write down only the numbers (a sample is given).

7. Solve the problem.

8. Explain why you decided this.

9. Check the correctness of the solution. …..