[Visual suppression during eye movements (a brief review on the problem of the mechanisms and their role in visual perception). II. Their role in visual perception]. / Podavlenie zreniia pri dvizheniiakh glaz (kratkii obzor po probleme "Mekhanizmy i rol' v zritel'nom vospriiatii"). Chast' II. Rol' v zritel'nom vospriiatii.

A role of both geniculate and tecto-thalamic channels in visual suppression has been considered. Some evolutional aspects of visual suppression are discussed. Both a hypothetical scheme of the multilevel structural and functional organization of visual suppression and a neurophysiological basis of the integration of object's elements to whole image are suggested from the author's papers. The functional role of visual suppression has been not limited the visual stability only but has been considered wider as the important stage of the visual perception by which both the proprioceptive sensation of the object's spatial position arise and the preparation of the visual system for the survey and the processing object's pure visual information (brightness, color, form, etc.) go on. The match of both proprioceptive and visual sensations lead in finally to spatial-visual image of the object.

[Visual suppression during eye movements (a brief review on the problem of the mechanisms and their role in visual perception). I. A brief review and the mechanisms]. / Podavlenie zreniia pri dvizheniiakh glaz (kratkii obzor po probleme "Mekhanizmy i rol' v zritel'nom vospriiatii"). Chast' I. Kratkii obzor i mekhanizmy.

A problem of visual suppression during eye movements is discussed. The short critical review of the main published papers is adduced. A comparative analysis of the literary and author's data has been considered. These data provide evidence for the existence of three but not two (how is maintained) mechanisms of visual suppression: a retinal, efferent copy, and proprioceptive (from extraocular muscles) signals. The proprioceptive mechanism is more powerful than efferent copy. Both retinal and extraretinal mechanisms of visual suppression are discussed in detail. The sources and the passage's pathways of the extraretinal signals are considered thoroughly. It is shown that the retino-geniculate system provide mainly retinal mechanisms vs the tecto-thalamic system provide extraretinal mechanisms.

[The dynamics of somatosensory and visual evoked potentials as a correlate of reversible states of altered consciousness]. / Dinamika somatosensornykh i zritel'nykh vyzvannykh potentsialov kak korreliat obratimykh sostoianii izmennogo soznaniia.

Somatosensory and visual evoked potentials (EPs) of the brain of 17 sensitive subjects (extrasenses) and 12 ordinary healthy subjects were studied. It was found that during extrasensory activity (direct impact, meditation) in comparison to rest values, the amplitude of intermediate and late components of visual and somatosensory EPs of both hemispheres and early components of somatosensory EPs of ipsilateral in relation to stimulation hemisphere diminished 2-4--fold. There was a recovery of these components after discontinuation of extrasensory activity. It is shown that ordinary subjects could not change their EPs when they tried their best to decrease EPs. It is shown that ordinary subjects could not change their EPs when they tried their best to decrease EPs. It is suggested that the ability of extrasenses for reversible changes of their mind by direct adjustment of the activity of the ascending nonspecific systems of the brain and by alterations of interhemispheric relations forms the basis of extrasensory activity.

[Participation of the thalamic reticular nucleus in the shaping of the interrelations of the mesencephalic reticular formation and the lateral geniculate body]. / Uchastie retikuliarnogo iadra tamalusa v formirovanii vzaimootnoshenii mezéntsefalicheskoi retikuliarnoi formatsii i naruzhnogo kolenchatogo tela.

On the awake rabbits and cats under nembutal anesthesia it has been shown that the reticular nucleus of the thalamus takes considerable part in the formation of reticulogeniculate response of the lateral geniculate body (LGB) to electrostimulation of the mesencephalic reticular formation. It is assumed that the reticular nucleus of the thalamus takes basic part in a realization of "rapid" physical influences of the reticular formation on the LGB.

[Formation of slow background activity in different parts of the visual analyzer following section of half the tectum mesencephali]. / Formirovanie medlennoi fonovoi aktivnosti razlichnykh otdelov zritel'nogo analizatora pri pererezke poloviny pokryshki srednego mozga.

Significant changes in the formation of electrical activity rhythms have been revealed in the lateral geniculate body, superior colliculus and visual cortex during section of one half of midbrain operculum in cats anesthetized with nembutal. It was determined that all changes in slow activity generation in the lateral geniculate body, superior colliculus are reflected in changes in the formation of electrical activity of the visual cortex. It is suggested that lateral geniculate body and superior colliculus may be involved in the generation of some electrical activity rhythms of the visual cortex.

[Distribution of specific signals of different modality in the associative parietal area of the cat cortex]. / Kharakter raspredeleniia spetsificheskikh posylok raznoi modal'nosti po assotsiativnoi temennoi oblasti kory koshki.

In cats under nembutal anesthesia eliciting specific early components of association responses, the drug parietal distribution upon forepaw and thalamic stimulation was studied: relay somatic-ventrobasal complex (VB) and association nuclei, transmitting specific visual impulses in pulvinar (Pul) and lateral-posterior (LP) areas. Signals of maximum intensity were observed in response to peripheral and central stimulation near somatic area and in response to Pul and LP stimulation in the medial part of parietal cortex. Besides, a general principle revealing more intensive signals of different modality in the areas near lateral sulcus than in other parietal areas was established. The difference in processing of specific polysensory signals in various parietal areas and consequently, different involvement of the latter into the systemic action of the brain was proved, this being related to the character of topical organization of these signals.

[Effect of deafferentation of the lateral geniculate body on its background activity]. / Vliianie deafferentatsii naruzhnogo kolenchatogo tela na ego fonovuiu aktivnost'.

Elimination of reticular inputs to the lateral geniculate body (LGB) by sectioning of one half of the midbrain operculum, did not affect significantly the characteristics of the LGB evoked potential to light stimulus. At the same time LGB response to stimulation of the reticular formation by a single current impulse, though did not disappear completely, but changed greatly: its latency became twice as long, the negative component of the response was no more recorded. In conditions of LGB deafferentation, the characteristics of all rhythms of its electrical activity, besides the alpha-like one, considerably changed. At the same time, exactly this last rhythm underwent the greatest changes on the EEG of the visual cortex. On the basis of the obtained data it is suggested that the reticular formation takes a considerable and multiple part in generation of LGB rhythmic activity and that changes in its characteristics are clearly reflected in the ECoG rhythms formation. Retention of the LGB visual evoked potential and of the response to stimulation of the reticular formation after the section of one half of the midbrain operculum testifies to the presence of several reticular inputs to LGB.

[Interhemispheric integration and role of the midbrain in its achievement]. / Mezhpolusharnaia integratsiia i rol' srednego mozga v ee osushchestvlenii.

In addition to two previously discovered midbrain systems of connections between forebrain hemispheres, surgical, electrophysiological and conditioned analysis revealed in cats another system of midbrain connections mediating interhemispheric interrelations. It represents functional projections of the anterior colliculus to the contralateral posterothalamic nuclear complex via the reticular formation or/and via the reticular formation and the contralateral anterior colliculus. By its structural organization this system occupies an intermediate position as compared to the described two systems because it involves the same structures. It seems to participate in conducting efferent (executive) or coordinating influences.

[Functional organization of the tecto-thalamic link of the transcollicular afferent channel of the visual analyzer]. / Funktsional'naia organizatsiia tekto-talamicheskogo zvena transkollikuliarnogo afferentnogo kanala zritel'nogo analizatora.

The distribution of the evoked potentials in pulvinar, lateralis posterior, posterior, suprageniculate and dorsolateral nuclei of the thalamus was studied on anesthetized cats after electric stimulation of the optic tract and the surface layers of the superior colliculus. It is found that the functional projections of the superior colliculus and the optic tract to the posterior thalamus differ from each other. A suggestion is made that the transcollicular afferent channel of the visual system is not reduced during evolution.