Disorders of System Brain Activity in Children with Motor (Expressive) Alalia
Motor alalia refers to the number of violations of expressive speech that are caused by the dysfunction of cerebral structures in the period when the formation of speech system is not complete. This form of speech disorder is considered as a language disorder characterized by a persistent violation of the assimilation of a system of linguistic units. Possible cause of deviations in the development of speech function in children is a disproportion in the levels of development of speech structures in the left and right hemispheres, and such temporary dominance is often associated with increased activity in the right hemisphere. According to the results of electroencephalographic studies in children aged 5-6 years, there are two types of changes of the biopotential system interaction of the brain cortex. The disorders of the spatial organization of interregional EEG correlations were more pronounced in either the left or right hemispheres of the brain. Thus, motor alalia can be accompanied either by disturbances in the interaction between the Broca and Wernicke areas of the left hemisphere, or between symmetrical areas of the right hemisphere.