Abstract
A vestibulo-ocular reflex (VOR) test was carried out on forty-five normal subjects. The subjects sat in a newly devised, pendular, rotating chair in an optokinetic drum, by which device sinusoidal rotation and optokinetic stimulation could be given simultaneously.They were rotated sinusoidally at amplitudes of 120 degrees and 240 degrees, at frequencies of 0.05Hz and 0.1Hz. With these stimulations there was no response decline phenomenon nor influence of amplitude on frequency.The VOR gain measured in the dark room with the eyes open was about 0.6, and did not vary when the eyes closed. The VOR gain in the light room in a stationary optokinetic drum was about 1.1. In relation to the pendular optokinetic nystagmus test, the 0.1Hz sinusoidal rotation with an amplitude of 240 degrees was an appropriate stimulation.
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