FUNCTIONAL ASYMMETRY OF THE BRAIN AND AMPLITUDE OF THE ALPHA-RHYTHM

The dynamics of the EEG alpha-rhythm asymmetry was studied in 42 subje cts before and in the process of verbal activity. Three groups of subj ects were identified. 1. The first group was characterized by the domi nant activation of the left hemisphere in the background activity and during the first presentations of functional loads. With subsequent pr esentations the right hemisphere became more activated. 2. In subjects of the second group the right hemisphere was initially more activated . The left hemisphere was more activated only during the first present ations of functional loads. At the final stages, their right hemispher e became again more activated. 3. The third group of subjects was iden tified by the high level of activation of the right hemisphere in the background activity and during the first presentations of functional l oads, and by activation of the right hemisphere at the final stages.