[The cortical reactions during sensory and motor activities in healthy children and adults and in depression patients].

Studying the visual perception by means of EP recording in the visual and motor cortical areas and cortical reactions during hand movements revealed resemblance of these reactions in children to those in patients with endogenous (cyclophrenia and low-progredient schizophrenia) depressive disorders. In perception, the latency of the early and middle EP components was reduced. An increase in reactivity of the right hemisphere and ipsilateral reactions were induced by the movement.

[Changes in the reactivity of the sensorimotor cortex resulting from the treatment of patients with depressive disorders].

Changes in the mu-rhythm power in response to sound (non-specific reactivity, NR) and related with the actual and imaginary movement with the right and left hand in response to sound (specific reactivity, SR) were studied in 38 right-handed patients with subdepressive psychogenic (PD) and endogenous (ED) disorders before and after successful complex treatment (pharmacotherapy and acupuncture) in comparison with 23 healthy subjects. The successful treatment was found to be accompanied by a certain extent of normalization of the disturbed SR which was different in PD and ED. The more complete recovery of the normal reactions in PD was mainly accounted for by the relative decrease in the NR and increase in the SR.

[The temporal correlations of the VEP of the visual and motor cortices during the perception and mental reproduction of an image in normal children and in those with intellectual disorders].

Temporal relations were analyzed between the VEP components in the occipital and central cortical areas in 7 and 10-year-old boys with normal intelligence, with mental retardation, and with debile oligophrenia in three experimental sessions with different instructions. It was found out that the intrahemispheric relations of the isopolar VEP components to a flash and patterned stimulus similar to those in adult persons developed in healthy children only to the age of 10 years. In children with intellectual deficiency such relations were distorted both in perception of the flash and patterned visual stimuli and during mental representation of the latter.

[The reactivity of the sensorimotor rhythm in patients with depressive disorders].

Reactions of mu-rhythm to sound (unspecific reactivity), actual and imaged movement (specific reactivity) were studied in 30 right-handed patients with psychogenic (Pg) and endogenous (Eg, cyclophrenia and low-progredient schizophrenia) subdepressive disorders and 23 healthy subjects. Predominant derangement of specific reactivity was revealed in patients which consisted in attenuation of reactions and reorganization of interhemispheric relations. During the actual movement there was a decrease in mu-rhythm reactivity in the left hemisphere and its increase in the right one.

[The electrophysiological characteristics of brain function in mental disorders in participants in the cleanup of the aftermath of the accident at the Chernobyl Atomic Electric Power Station].

150 liquidators who had worked in the Chernobyl accident area were examined. All of them had mental diseases. Both alpha-rhythms disorganisation and increase of beta-1 activity were usually observed in brain cortex sensomotor areas of 43 patients as compared with 17 healthy individuals.