MOTION DEFINED EXCLUSIVELY BY 2ND-ORDER CHARACTERISTICS DOES NOT EVOKE OPTOKINETIC NYSTAGMUS

被引:56
作者
HARRIS, LR [1 ]
SMITH, AT [1 ]
机构
[1] UNIV WALES COLL CARDIFF,DEPT PSYCHOL,CARDIFF CF1 3YG,WALES
基金
加拿大自然科学与工程研究理事会;
关键词
MOTION PERCEPTION; OPTOKINETIC NYSTAGMUS; 2ND-ORDER MOTION; VISUAL NOISE;
D O I
10.1017/S0952523800001802
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
We showed high-contrast, second-order motion stimuli to subjects whilst recording their horizontal eye movements. These stimuli were very poor at evoking optokinetic nystagmus. Smooth-pursuit eye movements and fixation were reduced by a masking band +/-2.5 deg above and below an imaginary fixation point. First-order stimuli evoked vigorous optokinetic nystagmus (OKN) under identical conditions and also when matched for apparent contrast. These findings are discussed in terms of the site of detection of second-order motion.
引用
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页码:565 / 570
页数:6
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