[Neurophysiological peculiarities of cognitive activity in patients anxiety-depressive and hypochondriacal disorders].

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.