[Hemispheric organization of verbal memory functions in seasonal winter depression: electrophysiological analysis].
Spatial organization of EEG power and coherence during memorization of dichotically presented lists of words were studied in patients with winter depression (N = 17) and control subjects (N = 22). In contrast to the control subjects, the depressed patients were characterized by the higher theta power in the right parietal and posterior temporal regions and the dominance of the alpha 2 in the left midfrontal area. The patients also differed in the lower theta 2 coherence in the left hemisphere and lower alpha 1 coherence in the right hemisphere. These effects showed different intrahemispheric distribution. The interhemispheric EEG coherence in the theta 2 range between the frontal areas and alpha 1 coherence between the left frontal and right posterior areas was lower in the patients than in the control subjects. Verbal-emotional interaction in depressions are discussed.
Institute of Physiology, Russian Academy of Medical Sciences, Siberian Branch, Novosibirsk.
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Vol'f
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Pasynkova
D000328:Adult; D003344:Cortical Synchronization; D004569:Electroencephalography; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008568:Memory; D008875:Middle Aged; D019964:Mood Disorders / Q000503:physiopathology* / Q000523:psychology; D012621:Seasons; D014705:Verbal Behavior