Biomedical subjects

G M Zenkin

Publications and source records attributed to G M Zenkin.

21 records · Page 2Linked to original sources

PubMedDate not supplied

[Model studies of lateral inhibition as a mechanism of detecting motion. II. Modeling feedback inhibition].

A program is worked out which imitates non-stationary lateral inhibition in two-dimensional retina with physiologically real characteristics. Experiments with moving and flashing stimuli of different size are carried out. It is shown that lateral inhibition may serve as a mechanism which forms selective sensitivity of the elements involved to the movement of the stimuli. Recurrent inhibition proves to be more effective than the direct one providing that a longer delay in time exists. The results obtained are explained by the peculiarities of recurrent inhibition as the feedback system.

Animals↗

PubMedDate not supplied

[Torsion movements of the human eye. III. Rapid phase of torsion].

Kinematic characteristics of torsional saccades and their peculiarities were investigated. The torsional saccades were found to occur simultaniously in both eyes and had the same size and duration. It was shown that the peak velocity and the duration of the saccades depend on their amplitudes. The number of the saccades decreased and their sizes increased when the head tilts were faster. In the case intervals between the saccades decreased up to 20-30 ms. The likeness of the torsional movements and rotatory nistagmus was discussed.

Biophysical Phenomena↗

PubMedDate not supplied

[Torsional movements of the human eye. I. Torsional movements on inclining the head towards the shoulder].

The characteristics of the torsional eye movements during head tilting were investigated. Different conditions were used in the experiments. The subjects were in sitting and lying positions in the light and in the dark. A new method of recording with the suction device of Yarbus and the simple optical system allowed to have records without some redundant components of movement. This made record processing less complex and more accurate. The torsional drift in the slow phase of the eye movement was found present under any conditions. When being recorded simultaneously both eyes in man were in identical and synchronous movement.

Eye Movements↗