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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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Citing This Article：

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).