PubMed Health⌕ Search

Biomedical subjects

G M Zenkin

Publications and source records attributed to G M Zenkin.

At least 19 recordsLinked to original sources
PubMed1981

[2 types of lateral inhibition in frog retinas].

The influence of different pharmacological agents on the inhibition in the frog retina was investigated by means of recording ERG from the inner plexiform layer. Two different types of lateral inhibition were distinguished: "near", sensitive to picrotoxin, and "distant", sensitive-strychnine. The "distant" inhibition appears to be the familiar lateral inhibition transmitted by propagating spikes. The "near" picrotoxin-sensitive lateral inhibition does not depend on propagating spikes. Localization of two types of lateral inhibition in the plexiform layers is discussed.

Animals↗
PubMed1976

[Torsional movements of the human eye. II. Slow phase of torsion].

At different experimental conditions quantitative characteristics of the slow phase of the torsional eye movements were investigated. We found the torsional drift to increase when the head tilted faster and its velocity was bigger in the dark than in the light. Asymmetry of the drift velocity was found on moving the head to and backward. It was shown that the sign of the asymmetry did not depend on rotatory movements of the cup (the suction device for eye movement registration). At the same time electric stimulation of the labyrinth changed the sign of asymmetry and without head tilting led to the torsional eye movements (nistagmus). Some subjects were able to decline the number of the torsional saccades at will, and as a result the eye made a drift up to tens of degrees long. Possible causes of imperfect vestibular and optokinetic compensation in the eye trosion were discussed.

Ear, Inner↗
PubMedDate not supplied

[Histochemical studies of the sensitivity of frog retinal cells to stimulus movement and flashes].

The technique of quantitative UV-cytophotometry of RNA was used for comparative study of the sensitivity of frog retina cells to the movement of stimuli and flashings. A corresponding set of stimulators which includes the movement of mounted stimuli and heterogenous flashings of diffuse light showed that a type of cells exists in the interior nuclear layer of the retina which is specifically sensitive to the movement. It is suggested that in the formation of this property a dynamic reciprocal lateral inhibition on the level between bipolar and amacrine cells takes place. Application of heterogenous flashing light allowed also to reveal functional variety of bipolar cells.

Animals↗