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Biomedical subjects

V I Shostak

Publications and source records attributed to V I Shostak.

At least 19 recordsLinked to original sources
PubMed1993

[The topographic mapping of evoked bioelectrical activity and other methods for the functional neural visualization of the brain].

The paper is concerned with comparative characterization of brain functional imaging used in medicine today: bioelectrical activity mapping, assessment of spatial changes in cerebral blood flow by radionuclide and hydrogen clearance, NMR imaging, PET-scan, magnetoencephalography and thermoencephaloscopy. Original researches in neurosurgery clinic with the use of the mapping of evoked potentials enable the conclusion to be drawn about advisability of applying these methods in treatment and diagnostic practice. Besides, the mechanisms of compensation for higher mental functions in organic brain lesions are discussed.

Adolescent↗
PubMed1992

[Military occupational work capacity as a criterion of health].

The indices of physical, sensor and task performance were used to characterize and estimate the functional state of military specialists and their functional reserves. Application of these criteria gives the possibility for physician-prophylaxist to obtain a truly information about the health status in the military unit making a selective control in it.

Health Status↗
PubMed1983

[Effect of flash on optokinetic nystagmus and postoptokinetic reactions].

Chronic experiments in rabbits revealed disturbances of visual function and the rate of restoration of detecting sensitivity to perception of movements after flash,--by means of the duration of the optokinetic nystagmus (OKN) absence and the period of the optokinetic (OK) responses restoration after the action of flash on the retina. Besides, the duration od the reverse postoptokinetic nystagmus (RPN) after the flash was determined in presence of illuminated OK--cylinder and the stripes in visual field, the latters being an object of fixation under normal conditions leading to cessation of the RPN. The RPN under these conditions lasted for 64.1 +/- 4.3 sec after the flash, switching off the light leading to reappearance of the RPN. The OKN, in spite of the OK stimulation, is absent after the flash during 118.0 +/- 8.4 sec and reaches its initial level within 175.2 +/- 21.7 sec starting from the first stimulus.

Animals↗
PubMed1979

[Patterns of afferent signal convergence in the neurons of the frog midbrain tectum].

The activity of 168 optic tectum units was recorded in conditions of separate and combined actions of light, sound, and pain stimuli. The sensitivity of the neurons to multisensory convergence depended on their spontaneous activity. Excitatory--inhibitory characteristics of responses to unspecific stimuli in most cases were similar to specific responses. Combined action of different stimuli complicated and increased the number of response types.

Animals↗