[Functional brain asymmetry and alpha rhythm amplitude].
The dynamics of the EEG alpha-rhythm asymmetry was studied in 42 subjects before and in the process of verbal activity. Three groups of subjects were identified. 1. The first group was characterized by the dominant activation of the left hemisphere in the background activity and during the first presentations of functional loads. With subsequent presentations 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 presentations of functional loads. At the final stages, their right hemisphere became again more activated. 3. The third group of subjects was identified by the high level of activation of the right hemisphere in the background activity and during the first presentations of functional loads, and by activation of the right hemisphere at the final stages.
Institute of Higher Nervous Activity and Neurophysiology, Russian Academy of Sciences, Moscow.
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Rusalova
D000161:Acoustic Stimulation; D000328:Adult; D000513:Alpha Rhythm / Q000379:methods; D004292:Dominance, Cerebral / Q000502:physiology*; D006801:Humans; D012815:Signal Processing, Computer-Assisted; D013060:Speech / Q000502:physiology; D013997:Time Factors