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A S Batuev

Publications and source records attributed to A S Batuev.

At least 19 recordsLinked to original sources
PubMed1990

Unit activity of the medial wall of the frontal cortex during delayed performance in rats.

Unit activity from the medial frontal cortex was studied in rats during delayed performance on the U-shaped maze. Most units sampled responded to more than one event in the experimental sequence. Spatio-selective units suggest that this area is involved in short-term memory. Several types of spatio-selective units were recorded. Specific responses of spatio-selective units appear linked with a level of training. A possible role of the medial wall for goal-directed behavior based on probability prognosis is discussed.

Animals↗
PubMed1990

Association brain systems as apparatus of behavior control involving dominanta and conditioning.

The author's major conception concerning the associative brain systems (thalamoparietal and thalamofrontal) as the behavior control system are presented. The participation of association systems in performance of higher brain functions, due to the entrance of the whole information spectrum of biological and signal significance and the presence of neuronal plastic mechanisms, ensures the mechanism for retrieving the whole behavior programs from long-term memory, the ability of short-term storing of behavior programs, and estimation of their adequacy on the ground of dominanta and conditioning mechanisms.

Animals↗
PubMed1989

The role of inhibitory processes in the formation of functional properties of neurons in vibrissal projection zone of the cat somatosensory cortex.

The role of intracortical inhibitory processes in the formation of neuronal receptive fields in the vibrissal projection zone of the somatosensory cortex was studied. Iontophoretic application of picrotoxin and bicuculline blocks the inhibition and causes the loss of directional sensitivity in neurons. Activation of inhibition by distant glutamate application gives opposite results--neurons become direction sensitive. A dependence was found between spatial location of activated cells and the pattern of changes of their detector properties. Inhibitory processes caused by natural afferent stimulation lead to similar changes in the functional properties of neurons.

Animals↗
PubMed1989

Cortical sensorimotor integration: a hypothesis.

A hypothesis is proposed that neocortex is constructed from structural neuronal modules (columns and rings). Each module is considered as unit for cortical sensorimotor integration. Complex functional relationships between modules can be arranged by intracortical inhibition participation. High pronounced neocortical plasticity ensures the process of continuous formation of various dominating operative constellations comprising stable neuronal modules whose component structure and distributive characteristic are determined by the dominant motivation and the central motor program.

Cerebral Cortex↗
PubMed1989

Neuronal mechanisms of goal-directed behaviour in monkeys.

The present paper is a review of investigations by the author and coworkers on rearrangements of impulse activity of single cortical neurons and subcortical structures in monkeys during the performance of delayed alternation choice. In prefrontal and parietal cortices as well as in the head of the striate nucleus and in the anterior ventral thalamic nucleus spatioselective neurons are found which detect cue location. This spatial selectivity is retained within the entire delay. Neurons of shortterm memory and units involved the realization of a forthcoming goal-directed movement are found in the prefrontal and parietal cortices. Basing on morphophysiological data intracortical reverberation might be considered a principal mechanism of storing the relevant information in shortterm memory. Intracortical neuronal circuits in the prefrontal cortex and long thalamocortical loops of direct connections and feedback in the parietal cortex may ensure this type of reverberation. The above brain structures comprise a dynamic constellation which provides extraction from longterm memory and storing in the shortterm memory of information about the conditioned signal properties and the relevant motor program.

Animals↗
PubMed1989

[Associative brain systems as the behavioral control apparatus based on the dominant and conditioned reflex].

The main statements of author's conception concerning the associative brain systems (thalamoparietal and thalamofrontal) as the behaviour control systems are presented. The participation of associative systems in performance of the high brain functions ensures due to the entrance of the whole information spectrum of biological and signal significance into them and to the presence of neuronal plastic mechanisms, the mechanisms for retrieval the whole behaviour programs from the long-term memory and the ability of short-term storing of behaviour programs and estimation of their adequacy on the ground of dominant and conditioning mechanisms.

Animals↗
PubMed1988

[Structural bases of the plasticity of the nervous system].

The present state of morphological study of variability in the nervous elements under conditions of adaptive change under the influence of afferent effects, age changes during different periods of ontogenesis, under conditions of de- and regeneration of synapses have been considered. A question on correlation between structure and the function of synapses during the change has been analysed. The tasks of subsequent study of this problem have been outlined.

Adaptation, Physiological↗
PubMed1988

[Primary dominant focus in thirst motivation].

In cats kept on the salt diet, spontaneous cortical EEG and electrohypothalamogram were recorded in stimulation of the tongue, stomach and intestine receptors with salt solutions. Longlasting bursts of hypersynchronized activity (HA) were recorded in the lateral and supraoptic nuclei of the hypothalamus, the bursts spreading over to the brain cortex in longer salt diets. The HA also were evoked with light and sound stimuli and disappeared after intracavital administration of water or after i.v. administration of saline. A primary focus of stationary excitation possessing some features of a dominanta in formation of the thirst motivation, seems to appear in the hypothalamus.

Animals↗
PubMed1987

[Methodological problems in the neurophysiology of behavior].

The methodological problems of correlation of analytical and synthetical approaches (reduction and integration) in research on the brain mechanisms of behaviour are considered. The correlation of plasticity of polyfunctional brain structures with relative stability of behavioral defects after the damage of the same structures are discussed. The teaching of A. A. Ukhtomskiĭ on the dominant as a complex of brain mechanisms securing the active behavioral nature may be a methodological basis for purposeful experimental studies.

Animals↗
PubMed1985

Comparative characteristics of unit activity in the prefrontal and parietal areas during delayed performance in monkeys.

Neuronal mechanisms of prefrontal and parietal areas were compared in 3 monkeys during delayed performance. Spatioselective neurons were found in both areas in question. In the prefrontal cortex, they constitute 28% of all units sampled and in the parietal cortex they account for 21%. For the prefrontal area, spatial selectivity was particularly great during the delay (8%), and in the parietal area during the cue display (9%). During the delay, however, spatioselective parietal neurons accounted for 4% of all units sampled, i.e. their number was half that in the prefrontal area. The prefrontal cortex appears to play a major role in short-term memory proper, whereas the parietal area is more involved in assessing spatial relationships of emerging sensory stimuli. Spatioselective neurons of both areas were heterogeneous in their functions. Activity of some (11% in the prefrontal and 10% in the parietal area) was related only to the cue location. Activity of others (13% in the prefrontal cortex and 8% in the parietal cortex) was moreover coupled with the forthcoming movement. With lengthening of the delay, units related to the established temporal stereotype and some labile units which quickly rearranged to a new temporal task were recorded. Thus association area neurons reflect two concurrent processes linked with spatial and temporal memories. During cue displays, it is not only their spatial location that is described, but also a future motor act with its temporal and spatial properties programmed.

Animals↗