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[Neurophysiological peculiarities of cognitive activity in patients anxiety-depressive and hypochondriacal disorders]
N N Lebedeva1, V Yu Maltsev2, K I Pochigaeva3
1Institute of Higher Nervous Activity and Neurophysiology of RAS, Moscow, Russia; Moscow Research and Clinical Centre for Neuropsychiatry, Moscow, Russia.
Aim:
To study neurophysiological features of the cognitive activity in patients with anxiety-depressive and hypochondriacal disorders.
Material And Methods:
The study included 65 people: 16 with hypochondriacal disorder, 23 with mixed anxiety and depressive disorder, and 26 control subjects. Heart rate variability method and electroencephalography were used.
Results And Conclusion:
There was a decrease in the beta-1 frequency range in EEG after performing cognitive test in patients with mixed anxiety and depressive disorder. Patients with hypochondriacal disorder had the reduced duration of RR intervals; increased beta-1 frequency range in the resting state; the increase in the dominant beta-2 frequency during the cognitive test, and in the standard deviation of theta-wave frequencies after the cognitive test.
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