Biomedical subjects

G G Vaĭtkiavichius

Publications and source records attributed to G G Vaĭtkiavichius.

3 recordsLinked to original sources

PubMedDate not supplied

[Adaptation effects in the analyzer of movement direction].

A prolonged observation of a point-like stimulus moving in a given direction influences the perception of movement direction of subsequent stimuli. The prolonged observation of the same stimulus results in a subjective drift of the perceived movement towards horizontal or vertical direction depending on which of these directions is nearer to the stimulus trajectory. If, however, the stimulus moves in vertical, diagonal and horizontal directions its perception does not change under prolonged observation.

Adaptation, Physiological↗

PubMedDate not supplied

[Model of the light intensity analyzer].

The paper deals with coding the light intensity in visual analyzer. The single "neurons" of the proposed model have the properties of B-, D-neurons (primary detectors) [1] or the properties of so-called detectors of the light intensity [2]. Such "psychophysical" characteristics of the model as Stevens law, Weber fraction are in a good agreement with similar characteristics of the real visual analyzer.

Mathematics↗

PubMedDate not supplied

[Adaptation in a detector system and differential sensitivity].

It is shown, that if during adaptation the sensitivity of single detectors of the models (1) is constantly decreasing proportionally to the level of their excitation, then the differential sensitivity of the whole system to the stimulus near the adapting stimulus increase. The condition is deduced under which the perceived value of stimulus parameter is invarable during adaptation. Calculated from these conditions invariable values of line inclination, hue of the patch, are in agreement with experimentally obtained data.

Adaptation, Ocular↗