Dysarthria in children: causes, symptoms and treatment of dysarthria

Dysarthria (ICD-10: R47.1) is a speech disorder that occurs in individuals with impaired functions of the speech apparatus when the communication of cells with nerve endings is disrupted, as a result of which the movements of the speech organs are limited and articulation is difficult.

The distinctive features of dysarthric speech are illegibility and crumpledness, which causes discomfort to the patient and often causes the development of depressive conditions.

The ICD-10 code for the clarifying diagnosis of “dysarthria” is F 80 (Specific disorders of speech and language development).

Dysarthria in children.

Dysarthria in children is one of the types of speech disorders that occurs due to damage to the central nervous system. The most obvious disorders of this disease are changes in intonation, tempo and rhythm of speech, as well as a violation of voice formation and a disorder of articulation of sounds.

Children who suffer from dysarthria have great difficulty chewing and swallowing. They sometimes have difficulty buttoning clothes, hopping on one leg, or cutting with scissors. It is also difficult for them to write, so they study in specialized schools. Very often there are contradictions between neurologists and speech therapists regarding dysarthria. If a neurologist does not see obvious disturbances in the function of the cranial nerves, he cannot call the speech disorder dysarthria. This question is almost a stumbling block between neurologists and speech therapists. This is due to the fact that a neurologist, after making a diagnosis of dysarthria, is obliged to carry out serious therapy for the treatment of brainstem disorders, although such disorders (excluding dysarthria) do not seem to be noticeable. The medulla oblongata, as well as the cervical spinal cord, often experiences hypoxia during childbirth. This leads to a sharp decrease in motor units in the nerve nuclei responsible for articulation. During a neurological examination, the child adequately performs all tests, but cannot cope properly with articulation, because it is necessary to perform complex and fast movements that are beyond the strength of weakened muscles.

Types, levels and forms of speech dysarthria in children

Table of types of disease by location of the lesion

Classification according to the degree of development of pathology:

• I (erased) - only a speech therapist can identify incorrect pronunciation during examination and examination, almost complete recovery is possible;
• II – pronunciation is clear, but defects are noticeable;
• III – the child is understood only by close people, strangers rarely;
• IV – even relatives do not understand the pronunciation or there is no speech, most often considered within the framework of cerebral palsy.

Important! The erased form is characterized by difficulty chewing solid food. Parents should not change their child's diet because of this. It is necessary to gradually accustom him to chew on the same basis as other people. Source: E.F. Arkhipova Erased dysarthria in children: a textbook for university students // M.: AST: Astrel: KHRANITEL, 2006, p.319

Causes of dysarthria

1. Organic damage to the central nervous system as a result of the influence of various unfavorable factors on the developing brain of a child in the prenatal and early periods of development. Most often, these are intrauterine lesions that are the result of acute, chronic infections, oxygen deficiency (hypoxia), intoxication, toxicosis of pregnancy and a number of other factors that create conditions for the occurrence of birth trauma. In a significant number of such cases, asphyxia occurs during childbirth and the child is born premature. 2. The cause of dysarthria may be Rh factor incompatibility. 3. Dysarthria occurs somewhat less frequently under the influence of infectious diseases of the nervous system in the first years of a child’s life. Dysarthria is often observed in children suffering from cerebral palsy (CP). According to E.M. Mastyukova, dysarthria with cerebral palsy manifests itself in 65-85% of cases. Classification of clinical forms of dysarthria Classification of clinical forms of dysarthria is based on identifying different locations of brain damage. Children with various forms of dysarthria differ from each other in specific defects in sound pronunciation, voice, and articulatory motor skills, require different speech therapy techniques and can be corrected to varying degrees.

Forms of dysarthria

Bulbar dysarthria

Bulbar dysarthria (from the Latin bulbus - a bulb, the shape of which is the medulla oblongata) occurs when there is a disease (inflammation) or tumor of the medulla oblongata. In this case, the nuclei of the motor cranial nerves located there (glossopharyngeal, vagus and sublingual, sometimes trigeminal and facial) are destroyed. Characteristic is paralysis or paresis of the muscles of the pharynx, larynx, tongue, and soft palate. A child with a similar defect has difficulty swallowing solid and liquid food and has difficulty chewing. Insufficient mobility of the vocal folds and soft palate leads to specific voice disorders: it becomes weak and nasal. Voiced sounds are not realized in speech. Paresis of the muscles of the soft palate leads to the free passage of exhaled air through the nose, and all sounds acquire a pronounced nasal (nasal) tone. In children with the described form of dysarthria, atrophy of the muscles of the tongue and pharynx is observed, and muscle tone also decreases (atonia). The paretic state of the tongue muscles causes numerous distortions in sound pronunciation. Speech is slurred, extremely unclear, slow. The face of a child with tabloid dysarthria is amicable.

Symptoms

In patients of any age with dysarthria, speech activity is impaired, which is due to a weakening of the connection between the tissues of the speech apparatus and the nerve endings. As a result of this disorder, a change in the respiratory rhythm occurs, which becomes more frequent and intermittent during speech.

The speech of a person suffering from dysarthria is characterized by vagueness and incomprehensibility. Speech disorders can have varying degrees of severity, depending on the stage of dysarthria. With erased dysarthria, disturbances in the pronunciation of sounds are practically not noticeable. However, as the pathology develops, speech defects become more obvious (speech is slow, certain sounds are missed). The most severe stage of dysarthria is characterized by the development of paralysis of the muscles of the speech apparatus and the subsequent inability to speak.

With dysarthria, the development of articulation disorders is observed: the tone of the muscles of the speech apparatus increases or decreases. Increased tone is accompanied by tension in the muscles of the neck, face, tongue and lips; decreased muscle tone is accompanied by laxity of the muscles of the lips and tongue. Patients have their mouth and lips slightly open and saliva is produced profusely.

In children with diagnosed dysarthria, the auditory perception of speech is distorted, the development of other disorders is noted, as a result of which concomitant speech deviations of a related nature and disturbances in the general development of the child arise.

Subcortical dysarthria

Subcortical dysarthria occurs when the subcortical nodes of the brain are damaged. A characteristic manifestation of subcortical dysarthria is a violation of muscle tone and the presence of hyperkinesis. Hyperkinesis is violent involuntary movements (in this case in the area of ​​articulatory and facial muscles) that are not controlled by the child. These movements can be observed at rest, but usually intensify during speech. The changing nature of muscle tone (from normal to increased) and the presence of hyperkinesis cause peculiar disturbances in phonation and articulation. A child can correctly pronounce individual sounds, words, short phrases (especially in a game, in a conversation with loved ones or in a state of emotional comfort) and after a moment he is unable to utter a single sound. An articulatory spasm occurs, the tongue becomes tense, and the voice is interrupted. Sometimes involuntary screams are observed, and guttural (pharyngeal) sounds “break through.” Children may pronounce words and phrases excessively quickly or, conversely, monotonously, with long pauses between words. Speech intelligibility suffers due to unsmooth switching of articulatory movements when pronouncing sounds, as well as due to disturbances in the timbre and strength of the voice. A characteristic sign of subcortical dysarthria is a violation of the prosodic aspect of speech - tempo, rhythm and intonation. The combination of impaired articulatory motor skills with disorders of voice formation and speech breathing leads to specific defects in the sound aspect of speech, which manifest themselves variably depending on the child’s condition, and are reflected mainly in the communicative function of speech. Sometimes with subcortical dysarthria in children, hearing loss is observed, complicating a speech defect.

Dysarthria

The speech of patients with dysarthria is slurred, unclear, and incomprehensible (“porridge in the mouth”), which is due to insufficient innervation of the muscles of the lips, tongue, soft palate, vocal folds, larynx, and respiratory muscles. Therefore, with dysarthria, a whole complex of speech and non-speech disorders develops, which constitute the essence of the defect.

Impaired articulatory motor skills in patients with dysarthria may manifest as spasticity, hypotonia, or dystonia of the articulatory muscles. Muscle spasticity is accompanied by constant increased tone and tension in the muscles of the lips, tongue, face, and neck; tightly closed lips, limiting articulatory movements. With muscle hypotonia, the tongue is flaccid and lies motionless on the floor of the mouth; the lips do not close, the mouth is half open, hypersalivation (salivation) is pronounced; Due to paresis of the soft palate, a nasal tone of voice appears (nasalization). In the case of dysarthria occurring with muscular dystonia, when attempting to speak, muscle tone changes from low to increased.

Sound pronunciation disturbances in dysarthria can be expressed to varying degrees, depending on the location and severity of damage to the nervous system. With erased dysarthria, individual phonetic defects (sound distortions) and “blurred” speech are observed.” With more pronounced degrees of dysarthria, there are distortions, omissions, and substitutions of sounds; speech becomes slow, inexpressive, slurred. General speech activity is noticeably reduced. In the most severe cases, with complete paralysis of the speech motor muscles, motor speech becomes impossible.

Specific features of impaired sound pronunciation in dysarthria are the persistence of defects and the difficulty of overcoming them, as well as the need for a longer period of automation of sounds. With dysarthria, the articulation of almost all speech sounds, including vowels, is impaired. Dysarthria is characterized by interdental and lateral pronunciation of hissing and whistling sounds; voicing defects, palatalization (softening) of hard consonants.

Due to insufficient innervation of the speech muscles during dysarthria, speech breathing is disrupted: exhalation is shortened, breathing at the time of speech becomes rapid and intermittent. Voice disturbances in dysarthria are characterized by insufficient strength (quiet, weak, fading voice), changes in timbre (deafness, nasalization), and melodic-intonation disorders (monotony, absence or inexpressibility of voice modulations).

Bulbar dysarthria

Bulbar dysarthria is characterized by areflexia, amymia, disorder of sucking, swallowing solid and liquid food, chewing, hypersalivation caused by atony of the muscles of the oral cavity. The articulation of sounds is slurred and extremely simplified. All the variety of consonants is reduced into a single fricative sound; sounds are not differentiated from each other. Nasalization of voice timbre, dysphonia or aphonia is typical.

Pseudobulbar dysarthria

With pseudobulbar dysarthria, the nature of the disorder is determined by spastic paralysis and muscle hypertonicity. Pseudobulbar paralysis manifests itself most clearly in impaired tongue movements: great difficulty is caused by attempts to raise the tip of the tongue upward, move it to the sides, or hold it in a certain position. With pseudobulbar dysarthria, switching from one articulatory posture to another is difficult. Typically selective impairment of voluntary movements, synkinesis (conjugal movements); profuse salivation, increased pharyngeal reflex, choking, dysphagia. The speech of patients with pseudobulbar dysarthria is blurred, slurred, and has a nasal tint; the normative reproduction of sonors, whistling and hissing, is grossly violated.

Subcortical dysarthria

Subcortical dysarthria is characterized by the presence of hyperkinesis - involuntary violent muscle movements, including facial and articulatory ones. Hyperkinesis can occur at rest, but usually intensifies when attempting to speak, causing articulatory spasm. There is a violation of the timbre and strength of the voice, the prosodic aspect of speech; Sometimes patients emit involuntary guttural screams.

With subcortical dysarthria, the tempo of speech may be disrupted, such as bradyllalia, tachylalia, or speech dysrhythmia (organic stuttering). Subcortical dysarthria is often combined with pseudobulbar, bulbar and cerebellar forms.

Cerebellar dysarthria

A typical manifestation of cerebellar dysarthria is a violation of the coordination of the speech process, which results in tremor of the tongue, jerky, scanned speech, and occasional cries. Speech is slow and slurred; The pronunciation of front-lingual and labial sounds is most affected. With cerebellar dysarthria, ataxia is observed (unsteadiness of gait, imbalance, clumsiness of movements).

Cortical dysarthria

Cortical dysarthria in its speech manifestations resembles motor aphasia and is characterized by a violation of voluntary articulatory motor skills. There are no disorders of speech breathing, voice, or prosody in cortical dysarthria. Taking into account the localization of lesions, kinesthetic postcentral cortical dysarthria (afferent cortical dysarthria) and kinetic premotor cortical dysarthria (efferent cortical dysarthria) are distinguished. However, with cortical dysarthria there is only articulatory apraxia, while with motor aphasia not only the articulation of sounds suffers, but also reading, writing, understanding speech, and using language.

Cortical dysarthria

Cortical dysarthria is very difficult to isolate and recognize. With this form, voluntary motor skills of the articulatory apparatus are impaired. In its manifestations in the sphere of sound pronunciation, cortical dysarthria resembles motor alalia, since, first of all, the pronunciation of words with a complex sound-syllable structure is impaired. In children, the dynamics of switching from one sound to another, from one articulatory posture to another, is difficult. Children are able to clearly pronounce isolated sounds, but in the speech stream the sounds are distorted and substitutions occur. Combinations of consonant sounds are especially difficult. At an accelerated pace, hesitations appear, reminiscent of stuttering. However, unlike children with motor alalia, children with this form of dysarthria do not experience disturbances in the development of the lexico-grammatical aspect of speech. Cortical dysarthria should also be distinguished from dyslalia. Children have difficulty reproducing articulatory posture, and it is difficult for them to move from one sound to another. During correction, attention is drawn to the fact that defective sounds are quickly corrected in isolated utterances, but are difficult to automate in speech.

Pseudobulbar dysarthria

Pseudobulbar dysarthria is the most common form of childhood dysarthria. Pseudobulbar dysarthria is a consequence of organic brain damage suffered in early childhood, during childbirth or in the prenatal period as a result of encephalitis, birth injuries, tumors, intoxication, etc. The child experiences pseudobulbar paralysis or paresis caused by damage to the pathways coming from the cerebral cortex to the nuclei of the glossopharyngeal, vagus and hypoglossal nerves. According to the clinical manifestations of disorders in the area of ​​facial and articulatory muscles, it is close to bulbar. However, the possibilities of correction and full mastery of the sound-pronunciation side of speech with pseudobulbar dysarthria are much higher. As a result of pseudobulbar palsy, the child's general and speech motor skills are impaired. The baby sucks poorly, chokes, chokes, and swallows poorly. Saliva flows from the mouth, facial muscles are disturbed. The degree of impairment of speech or articulatory motor skills may vary. Conventionally, there are three degrees of pseudobulbar dysarthria: mild, moderate, severe. 1. A mild degree of pseudobulbar dysarthria is characterized by the absence of gross disturbances in the motor skills of the articulatory apparatus. Articulation difficulties lie in slow, insufficiently precise movements of the tongue and lips. Disorders of chewing and swallowing are revealed faintly, with occasional choking. The pronunciation of such children is impaired due to insufficiently clear articulatory motor skills, speech is somewhat slow, and blurring is typical when pronouncing sounds. More often, the pronunciation of sounds that are difficult to articulate suffers: zh, sh, r, ts, ch. Voiced sounds are pronounced with insufficient participation of the voice. Soft sounds are difficult to pronounce and require adding to the main articulation the raising of the middle part of the back of the tongue to the hard palate. Pronunciation deficiencies have an adverse effect on phonemic development. Most children with mild dysarthria experience some difficulty in auditory processing. When writing, they encounter specific errors in replacing sounds (t-d, t-ts, etc.). There is almost no violation of the structure of the word: the same applies to grammatical structure and vocabulary. Some uniqueness can only be revealed through a very careful examination of children, and it is not typical. So, the main defect in children suffering from mild pseudobulbar dysarthria is a violation of the phonetic aspect of speech. Children with a similar disorder, who have normal hearing and good mental development, attend speech therapy classes at the regional children's clinic, and at school age - a speech therapy center at a comprehensive school. Parents can play a significant role in eliminating this defect. 2. Children with moderate dysarthria make up the largest group. They are characterized by amicity: lack of movement of the facial muscles. The child cannot puff out his cheeks, stretch out his lips, or close them tightly. Tongue movements are limited. The child cannot lift the tip of his tongue up, turn it to the right, left, or hold it in this position. Switching from one movement to another is a significant difficulty. The soft palate is often inactive, and the voice has a nasal tone. Characterized by profuse salivation. The acts of chewing and swallowing are difficult. The consequence of dysfunction of the articulatory apparatus is a severe pronunciation defect. The speech of such children is usually very slurred, slurred, and quiet. The articulation of vowels, usually pronounced with a strong nasal exhalation, is characteristic due to the inactivity of the lips and tongue. The sounds “a” and “u” are not clear enough, the sounds “i” and “s” are usually mixed. Of the consonants, p, t, m, n, k, x are most often preserved. The sounds ch and ts, r and l are pronounced approximately, like a nasal exhalation with an unpleasant “squelching” sound. The exhaled mouth stream is felt very weakly. More often, voiced consonants are replaced by voiceless ones. Often sounds at the end of words and in combinations of consonants are omitted. As a result, the speech of children suffering from pseudobulbar dysarthria is so incomprehensible that they prefer to remain silent. Along with the usually late development of speech (at the age of 5-6 years), this circumstance sharply limits the child’s experience of verbal communication. Children with such a disorder cannot study successfully in a comprehensive school. The most favorable conditions for their education and upbringing are created in special schools for children with severe speech impairments, where these students receive an individual approach. 3. A severe degree of pseudobulbar dysarthria - anarthria - is characterized by deep muscle damage and complete inactivity of the speech apparatus. The face of a child suffering from anarthria is mask-like, the lower jaw droops, and the mouth is constantly open. The tongue lies motionless on the floor of the oral cavity, lip movements are sharply limited. The acts of chewing and swallowing are difficult. Speech is completely absent, sometimes there are individual inarticulate sounds. Children with anarthria with good mental development can also study in special schools for children with severe speech impairments, where, thanks to special speech therapy methods, they successfully master writing skills and a curriculum in general education subjects. A characteristic feature of all children with pseudobulbar dysarthria is that with distorted pronunciation of the sounds that make up a word, they usually retain the rhythmic contour of the word, i.e., the number of syllables and stress. As a rule, they know the pronunciation of two- and three-syllable words; four-syllable words are often reproduced reflectively. It is difficult for a child to pronounce consonant clusters: in this case, one consonant is dropped (squirrel - “beka”) or both (snake - “iya”). Due to the motor difficulty of switching from one syllable to another, there are cases of likening syllables (dishes - “posyusya”, scissors - “noses”). Impaired motor skills of the articulatory apparatus leads to improper development of the perception of speech sounds. Deviations in auditory perception caused by insufficient articulatory experience and the lack of a clear kinesthetic image of sound lead to noticeable difficulties in mastering sound analysis. Depending on the degree of speech motor impairment, variously expressed difficulties in sound analysis are observed. Most special tests that reveal the level of sound analysis are not available to dysarthric children. They cannot correctly select pictures whose names begin with a given sound, come up with a word containing a certain sound, or analyze the sound composition of a word. For example, a twelve-year-old child who has studied for three years in a public school, answering the question what sounds in the words of the regiment, cat, names p, a, k, a; k, a, t, a. When completing the task of selecting pictures whose names contain the sound b, the boy puts aside a jar, a drum, a pillow, a scarf, a saw, and a squirrel. Children with better preserved pronunciation make fewer mistakes; for example, they select the following pictures based on the sound “s”: bag, wasp, plane, ball. For children suffering from anarthria, such forms of sound analysis are not available.

Symptoms and treatment

The main symptoms include the following:

• incomprehensible, slurred speech;
• spastic manifestations in the articulatory muscles (neck, lips, face, tongue are constantly tense, articulation is limited, lips are tightly closed);
• hypotonia of the articulatory apparatus (lips do not close, tongue lies motionless in the mouth, mouth is slightly open, increased salivation);
• dystonia of articulatory muscles (when a child tries to talk, his muscle tone goes from low to high);
• slurred pronunciation;
• in difficult cases, the child misses sounds, replaces them or pronounces them distorted; Source: O.Yu. Fedosova Features of sound pronunciation of children with mild dysarthria // Speech therapist in kindergarten, 2005, No. 2, pp. 36-41
• slowness of conversation;
• inability to speak (in severe forms);
• nasal voice without signs of a runny nose;
• change, omission, replacement of some sounds with others;
• fading of a phrase towards the end of its utterance, rapid breathing during a conversation due to lack of air;
• very high, almost “squeaky” voice;
• a fast or very slow flow of words, while the child cannot change the tone.

Treatment of dysarthria

Due to the fact that dysarthria is not an independent disease and can be observed with various manifestations of nervous system disorders, the content and order of all treatment measures will be established after the doctor makes a clinical diagnosis, taking into account the age and condition of the child. Treatment of dysarthria in children is carried out comprehensively. Depending on the stage of the disease, the following measures are used: speech therapy correction; drug treatment; massage; breathing exercises; Exercise therapy. Medicines are prescribed by a neuropsychiatrist. There are no drugs for the disease as such. The doctor prescribes medications that only remove the symptoms of the disease and alleviate the general condition of the patient.