系列阶跃刺激速度下视动性眼震与视动性错觉的反应特征

The characteristics of optokinetic nystagmus and optokinetic illusionat a series step stimulus speed

目的：探讨人对视动刺激心理、生理反应的特征．方法：分别给３０名男性军校学员一系列视动阶跃刺激（５，１０，１５，２０，３０，４０，６０，８０，１００，１２０℃／ｓ），每个刺激持续２０ｓ．用磁带机记录被试的视动性眼震信号，同时，记录被试者视动性错觉出现的潜伏期和错觉量．用７Ｔ１７信息处理仪采样处理视动性眼震信号，用模糊集途径量化错觉量．结果：①视动性眼震的快相速度和慢相速度均随刺激速度增加而增大，在６０°／ｓ达到峰值，在６０～１２０°／ｓ范围内基本维持稳定状态；②在５～１２０°／ｓ内，视动性错觉随刺激速度的增加而增大，呈直线上升．结论：视动性眼震与视动性错觉是视动刺激引起的生理和心理两方面的反应，各自表现不同的变化趋势，心理反应更加稳定．

Objective:To study the characteristics of human physiopsychological response to optokinetic stim-ulus. Method: 30 military university male students were given a series of optokinetic step stimulations (5,10, 15,20,30, 40, 60, 80, 100, 120 deg/sec).Each stimulus last for 20 s. The optokinetic nystagmus wasrecorded with tape recorder.At the same time, the latency and fuzzy estimate magnitude of the illusion werenoted down. The nystagmus was analysed with a computer analysis system of ENG and the magnitude of illu-sion was measured with a fuzzy set model for estimate magnitude of vestibular sensation. Results:(1)Theslow velocity(SV ) and fast velocity ( FV)of optokinetic nystagmus increased with optokinetic speed andreach its peak at 60°/s.It remained constant between 60～120°/s; (2)Between 5～120°/s,the magnitude ofoptokinetic illusion increased with stimulus speed linearly. Conclusion :Optokinetic nystagmus and optokinet-ic illusion are human physiopsychological responses to optokinetic stimulus. They are different in trend ofchange,and psychological response is more stable.