Specific feature of visual mechanisms in the right and left hemispheres of human brain

Disturbances in the visual perception were analysed in groups of patients after commissurotomy, unilateral electroshock therapy, local brain lesions in the structure of the visual system. Three groups of symptoms were distinguished, i. e., deficit in attention switching, defects of image fragment recognition, and disturbances in assessment of spatial relations between the fragments and their groups. It was shown that these groups symptoms were variously expressed in disorders of visual perception during pathologically autonomous activity of the-left or right hemisphere. A model-concept-of hemispheric specificity in the visual perception is developed.