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Biomedical subjects

O G Choraian

Publications and source records attributed to O G Choraian.

At least 19 recordsLinked to original sources
PubMed1981

[Dynamics of the information characteristics of the chemical composition of developing chick embryo organs].

Contents of 7 microelements in the yolk sac and liver have been studied. In the yolk sac wall, entropy decreases, and the organization degree increases; these phenomena correlate well with the known decrease in intensity of heat production and respiration during embryogenesis. The prefetal period of the embryonic development is characterized by entropy decrease in the liver; during the fetal period entropy remains nearly at a constant level. Essential differences are revealed both in entropy value and in organization degree between the yolk sac wall and the liver. The results obtained are discussed in connection with the hypothesis on principle peculiarities of functioning of the information systems of the living organism in ontogenesis.

Age Factors↗
PubMed1977

[Probability neuronal ensembles from the position of the theory of fuzzy sets].

The questions of organization and functioning of the probability neuronal ensembles in the cerebral central analysatory structures were regarded from the standpoints of the washed out multitudes theory. The possibility of formalization of structure of a neuronal ensemble (the washed out multitude of neurons) was shown, examples of determining the function of a neuron belonging to a neuronal ensemble were presented, the questions of transition from washed out multitudes to unwashed those were considered.

Mathematics↗
PubMed1975

[Several characteristics of the impulse reactions of crayfish receptor neurons to stimuli of different intensity].

Properties of the receptor cells responses in n. telsoni ventralis to the change in the direction, velocity and angle of displacement of the uropod hairs were studied in acute experiments with the crayfish Astacus leptodactylus. It is shown that the receptor neurons are characterized by an inverse relation between the latent period and the velocity of hairs displacement and by impulse frequency proportional to this velocity. The selective sensibility of the various receptor neurons to the direction and change of angular displacement of a hair was found. Certain zones of the angle of displacement of the uropod cells characterized by evoked maximum receptor cells responses are distinguished.

Animals↗