title: [Age-related dynamics of the reactivity of the sensorimotor cortex rhythms during real and imaginary movements in schoolchildren with total speech underdevelopment].
abstract: The author relates the age-associated dynamics of the responsiveness of rolandic alpha-, theta- and beta-I rhythms in 31 right-handed boys with total speech underdevelopment (TSU) and 32 healthy right-handed boys at real and mental motion of the left and right hand. Retardation of the development of the responses in children with TSU was shown as were rhythmic impoverishment and reflectivity of those responses. They were short of the ipsilateral response of the theta-rhythm during right hand motion, which is reviewed in healthy children as an early "extrapyramidal" stage of reacting. Emphasis is laid on an appreciable asymmetry of the encephalogram in children with TSU at rest and in healthy children at motion. The relationship is demonstrated between the number of synergic movements and the degree of maturity of the electroencephalographic response and the character of its lateralization. The rolandic alpha-rhythm in preschool children is regarded as a prototype of the adult mu-rhythm.
authors.forename: O A
authors.initials: OA
authors.lastname: Viatleva
mesh_terms: D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D004569:Electroencephalography; D007839:Functional Laterality; D006225:Hand; D006801:Humans; D008297:Male; D009044:Motor Cortex / Q000503:physiopathology*; D009068:Movement / Q000502:physiology*; D013003:Somatosensory Cortex / Q000503:physiopathology*; D013064:Speech Disorders / Q000503:physiopathology*
vernacular_title: Vozrastnaia dinamika reaktivnosti ritmov sensomotornoĭ kory pri real'nom i myslennom dvizhenii u doshkol'nikov s obshchim nedorazvitiem rechi.