[Electroencephalographic correlates of schizophrenic type mental disorders at an early age in childhood]. / Elektroéntsefalograficheskie korreliaty psikhicheskikh narushenii shizofrenicheskogo spektra v rannem detskov vozraste.

Electroencephalographic study was performed in 30 children of 1-3 years old from the group with the high risk of schizophrenia. Clinical observation of the patients was performed in the period of EEG recording and follow-up study was also made during 10-12 years. Three groups of patients were picked out with the differences in both clinical and electrophysiologic indices. Bundle beta-activity was registered on EEG in the cases of an active schizophrenic process. A presence of the spindles of the sleep and their dominance on EEG were characteristic for children with nonprocessual disorders of psychopathic-like type with disinhibition of the drives. Hypersynchronism of delta- and theta-activities were observed in the cases of schizotypic diathesis and an early children's autism with the predominance of paroxysmal somato-autonomic disorders.

[Specifics of the formation of the alpha rhythm in different areas of the cerebral cortex in young children]. / Spetsifika formirovaniia alfa-ritma razlichnykh oblastei kory golovnogo mozga u detei rannego vozrasta.

The age-specific features of distribution of capacity density values of modally specific monoherz components of optic alpha-rhythm and their response rearrangements to light stimulus suggest that in 2-3-year-old children, alpha-rhythm appears as three monoherz segments in the range 6-9 Hz with their heterodirectional changes. At this age stage of brain functional maturation, the authors have identified the border of synchronous and spasmodic changes in the spectral coherent indices of bioelectric activity formation in the projection and associative regions of the brain, which corresponds to 14-15 months of life.

[Evaluation of the effectiveness of polychemotherapy of glial tumors of the brain]. / Otsenka éffektivnosti polikhimioterapii glial'nykh opukholei golovnogo mozga.

A total of 85 courses of polychemotherapy were conducted in 23 patients after surgical treatment of malignant glial tumors. The efficacy of the treatment was checked by means of neurological, neuropsychological, and electroencephalographic methods of examination and radionuclide-gamma-tomography. The aggregate of these tests is necessary for detecting early signs of irresponsiveness of the tumor to chemotherapy and changing the treatment schedule.

[EEg changes after removal of craniopharyngiomas in children]. / Izmeneniia EEG posle udaleniia kraniofaringiom u detei.

Electroencephalograms (EEG) were studied after removal of craniopharyngioma in 75 children. Correlation of the character of ECG changes with the severity of the clinical condition was revealed. Maximally manifested pathological EEG activity of the central areas of the cortex and a phase character of the EEG changes with different duration of the phases determined by the patient's condition were common to all patients, irrespective of the severity of their condition which was determined by the degree of the pathological changes in the thalamo-hypothalamic structures. Prognostic signs of the EEG changes were identified, which characterized a favorable or a complicated course of the postoperative process.

[Heterogeneity of neurocytes of different brain regions to repeated superhigh-frequency irradiation]. / Geterogennost' reaktsii neirotsitov razlichnykh otdelov golovnogo mozga na mnogokratnoe sverkhvysokochastotnoe obluchenie.

The study was based on the analysis of morphological changes in the brain of 45 rats exposed for 10 days to ultrahigh frequency field of moderate gravity. Detailed studies of the state of the basophilic substance and the volume of the nuclei in the course of the neurocyte swelling were undertaken. The response of the neurocytes of various brain divisions was found to be heterogenous. The most pronounced were dystrophic changes in the sincipital area of the cortex. A lack of correlation between the character of the nuclear swelling and the degree of chromatolysis in the thalamic neurocytes was noted.

[Cortical evoked potentials in children with lesions at different levels of the brain stem]. / Korkovye vyzvannye potentsialy u detei pri porazhenii raznykh urovnei stvola mozga

Analysis was made of EPs in the occipital and central cortical areas of injured rhombencephalic and basal diencephalic parts of the brainstem. Localization of the pathological focus in the rhombencephalon brought about facilitation of the EP as expressed in stability of its forms in different subjects, increased amplitude and distinctness of early components in the occipital projection area. When the basal diencephalic structures are injured the EPs are reduced. The most affected in the occipital area are the early waves, and in the associative area, the late components of response. The results so obtained help to elucidate the role of the brainstem structures in the EP genesis.

[Study of the evoked potentials to photic stimulation in man after deafferentiation of the visual cortex]. / Issledovanie vyzvannykh potentsialov na svetovoe razdrazhenie u cheloveka pri deafferentatsii zritel'noi kopy

A study was made of evoked potentials (EP) in response to light stimulus in the occipital areas of the cortex in 28 patients with homonimous hemianopsia caused by focal affection of the optic system. EP asymmetry in the hemispheres was recorded only in case of complete homonimous hemianopsia. Reduction of response at the side of contralateral hemoanopsia was observed in affection of the optic tracts at the level of the optic cord and in case of spread of the pathological focus to the occipital lobe. In half of the cases of homonimous hemianopsia caused by affection of the optic radiation the responses were greater by amplitude at the side of the focus or were recorded only in the deafferentated occipital area.