The studies revealed that the level of interhemispheric bioelectric asymmetry, which reflects the functional relations between the hemispheres, is one of the major indices of the functional interaction of the two hemispheres. There were changes in interhemispheric asymmetry in relation to the tumor damage to the right or left hemisphere. The structural lesion of the left hemisphere did not appear to affect interhemispheric asymmetry, whereas right hemispheric dysfunction led to its significantly marked asymmetry, i. e. the mechanisms ensuring the stability and symmetry of electric activity of the two hemispheres are mainly associated with the structures of the right hemisphere.
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