双眼剥夺猫视皮层细胞的某些反应特性

SOME RESPONSE CHARACTERISTICS OF STRIATECORTICAL CELLS IN BINOCULARLY DEPRIVED CATS

小猫出生后第四周开始将其双眼剥夺,成年后记录。以正弦光栅为刺激研究了这些猫纹状皮层细胞的单眼和双眼反应特性。结果说明:在发育过程中,出生后早期视觉经验,对于保持相当比例的皮层细胞对视差调谐,是重要的。同样地,正常视觉环境刺激,对于保持双眼匹配的空间频率和朝向调谐是必需的。

<ABSTRACT> Kittens were binocularly deprived at the postnatal forth week and res- ponse of the striate cortical cells recorded at adult. The monocular and binocular response charcteristics of the striate cortical cells in these cats were studied with drifting sinusoidal gratings. Nearly half of the cells did not respond, or responded poorly, or gave unsteady discharges to grating stimuli. They could not be studied quantitatively. Some of the other cells showed binocular mismatched spatial frequency or mismatched orientation response properties. But quite more cells tuned to interocular relative spa- tial phase (binocular disparity ). The rosults suggest that normal early visual eiperience is important for keeping relatively more cells tuned to interocular phase difference, and keeping binocular matched spatial frequency and matched orientation response properties.