[Patterns of ocular neurovascular reactions].

Aim: To examine factors and determinants of ocular neurovascular reactions (NVR).

Material And Methods: The study included 120 healthy participants of both sexes aged 20.9±0.

[The overlapping in the striatum of the projection areas of corticofugal fibers from the somatosensory and motor regions of the rat cerebral cortex].

The Fink-Heimer techniques were used to determine the neostriatal projections from cortical M1 and S1 physiologically identified representations of the forepaw. While corticostriatal fibres from S1 enter dorso-lateral parts of the neostriatum fibres from M1 penetrate the dorsal part of the neostriatum more rostrally. Both fibre groups pass in rostrocaudal direction to the globus pallidum, forming terminals on their way.

[Connections of the representational area of the distal section of the forelimb in the rat sensorimotor cortex].

Using horseradish peroxidase, studies have been made on the distribution of retrogradely labeled nervous cells in the sensorimotor cortex of rats. The enzyme was injected into electrophysiologically identified zone of representation of the distal part of the forelimb in areas S2 and S1. It was found that this zone in S2 contains afferent connections mainly from representation of the same extremity in S1 and only a few afferents from other areas of S1, S2 and M1 of the same hemisphere.

[Correlation between the ipsi- and contralaterally directed nerve fibers from the C2 zone of the rat cerebral cortex].

On frontal sections of the brain of albino rats, by means of peroxidase technique, studies have been made on peculiarities of distribution of cortical nervous fibers from somatosensory zone C2 in fugal and comissural directions. Horseradish peroxidase was administered electrophoretically in the focus of the response to electrical stimulation of the distal part of contralateral forelimb of the animal. The data obtained were compared with the results of the distribution of labeled fibers from other, more lateral and medial zones.

[Reactions of reticular formation neurons in the rat during functional suppression of the cortical representation of the extremity stimulated].

Responses of single neurons of the reticular formation were studied in the unanaesthetized immobilized rats. Local cooling of the cortical sensory representation of the stimulated forepaw evoked reversible changes in the responses of most studied units (60 of 86) in different nuclei of the reticular formation. The responses of 25 cells changed only during stimulation of the paw the sensory cortex of which was cooled.