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分眼刺激时家兔的交替OKN眼动跟踪特性

韦敏, 孙复川

中科院上海生理研究所.上海 200031；中科院生物物理研究所视觉信息加工开放实验室.北京 100101

摘要

用不同运动图形分别同时刺激家兔左右眼,通过检测正常及单侧前庭迷路损伤后家兔的OKN反应,证明在这种刺激情况下,正常家兔的眼动反应为交替的OKN反应,为进一步探讨交替OKN的控制机制及控制部位建立了动物模型。单侧前庭迷路损伤后OKN交替现象仍然存在。

关键词： 眼球运动; 视动震颤(OKN）; 家兔眼动; 交替OKN

Alternating optokinetic nystagmus (OKN) elicited by dichoptically presented moving grating stimuli in normal and unilateral labyrinthectomized rabbits

Wei Min, Sun Fuchuan

Shanghai Institute of Physiology, Chinese Academy of Sciences.Shanghai 200031

Abstract

Optokinetic responses to two dichoptically presented grating moving in opposite directions were investigated in normal and unilateral labyrinthectomized rabbits. In normal rabbits, OKN took place alternately, while in unilateral labyrinthectomized rabbits, alternating OKN still took place only with some irregularity. These results indicate that OKN in rabbit to dichoptic stimulation is alternatelycontrolled by the velocity information comimg from the left and the right eye, a fact suggesting that the switching center of the control system locates somewhere behind the point of binocular summation in the central nervous system.

Key words: Eye movement;Optokinetic nystagmus;Rabbit OKN;Alternating OKN

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引用本文：

韦敏, 孙复川. 分眼刺激时家兔的交替OKN眼动跟踪特性[J]. 生理学报 1997; 49 (1): .

Wei Min, Sun Fuchuan. Alternating optokinetic nystagmus (OKN) elicited by dichoptically presented moving grating stimuli in normal and unilateral labyrinthectomized rabbits. Acta Physiol Sin 1997; 49 (1): (in Chinese with English abstract).