THE RHEOENCEPHALOGRAPHIC STUDY OF THE INTERHEMISPHERIC ASYMMETRY OF CEREBRAL BLOOD FLOW IN HEALTHY AND MENTALLY RETARDED CHILDREN.

The features of functional organization of hemodynamic processes in brain basins of healthy children and children with mild mental retardation depending on the nature of asymmetry and gradient of cerebral blood filling are investigated. The study was executed in the scientific laboratory of the special and inclusive education department of the Armenian State Pedagogical University after Kh. Abovyan and Armenian State Institute of Physical Culture and Sport. The study involved children aged 8 to 11 years, a total of 131. The 73 of them were healthy school children and 58 children with a low degree of mental retardation. Each category of subjects was divided into 2 age groups: 8-9 years and 10-11 years. According to the results of the study, in the control group, 88% of the examined patients showed a hyperfrontal pattern in terms of RI (rheogramm amplitude). In seven children, the hypermastoidal pattern was observed, and in the two children of the control group, no significant differences between the RI values in the frontal and mastoidal basins were found. The study involved 131 children aged 8 to 11 years old. 73 of them were healthy with normal physical and mental development as well as 58 children with a weak degree of mental retardation. The study was undertaken to determine which sport and physical activity allowed children with mental retardation. Established that the parameter of TPWV in 8-9-year-old and 10-11-year-old schoolchildren of the control group was significantly higher than that of experimental children in the frontal, bimastoidal and hemispheric basins. The hypermastoidal gradient pattern of IPVR was recorded in 55.2% of children in the control group, 13.8% of children have a hyperfrontal pattern, and 31% of schoolchildren lacked a reliable (p>0.05) gradient of peripheral vascular resistance between the bifrontal and bimasthoidal basins, which indicates the same level of resistance of the vascular wall in the compared pools. Note that, in 8-year-old schoolchildren, only the hypermastoidal IPVR pattern was recorded. In children 9-11 years old, either the absence of a gradient was revealed, or the gradients of both signs were established. Thus, in children of 8-9 years of age, the magnitude of the gradient is positively related to the age of children (r=0.75). Also with age, there is a decrease in resistance in the frontal and mastoidal basins, but to a greater extent in the frontal ones, which leads to a decrease in the gradient relative to 8-9 years old. A correlation between the brain IPVR in the frontal pool (r=0.54) and age was observed in children 10-11 years old. It is possible that the fall in resistance of the vascular wall of the frontal pool in this age group ensures intensive maturation of the frontal lobes.