在眼睛运动中对方向的感知
C S Royden1, M S Banks, J A Crowell
1School of Optometry, University of California, Berkeley 94720.
Nature
|December 10, 1992
概括
准确的方向感知,对于导航至关重要,依赖于视觉线索. 这项研究表明,人类需要视网膜外关于眼睛位置的信息来准确判断方向,特别是在快速眼动时.
科学领域:
- 视觉神经科学 视觉神经科学
- 人类的感知人类的感知.
- 导航 导航 导航 导航 导航
背景情况:
- 头部感知通常由自我运动期间视网膜运动流的扩张焦点决定.
- 当发生头部和眼睛运动时,视网膜运动模式偏离辐射流,使方向感知复杂化.
- 现有的方向感知模型包括基于视网膜外和视网膜图像的方法.
研究的目的:
- 为了研究外视网膜信息在眼睛运动中的方向感知中的作用.
- 测试方向判断是否需要在更高,更生态相关的眼动速度下进行视网膜外信号.
主要方法:
- 在模拟眼动和不模拟眼动的情况下,在模拟翻译的条件下测量了头部感知.
- 该研究比较了缓慢的眼动速度 (如在先前的研究中) 和更高,更典型的速度的性能.
- 观察者在模拟地面平面上追踪一个点时判断方向,而不是用模拟的眼睛运动固定一个静止点.
主要成果:
- 复制了先前在非常缓慢的眼动中表现相似的研究结果.
- 在更高,更自然的眼球运动速度下,在没有视网膜外信息的情况下,方向感知精度显著下降.
- 当可获得视网膜外眼睛位置信息时,表现显著改善.
结论:
- 关于眼睛位置的视网膜外信息对于在许多涉及眼睛运动的现实世界观看条件下准确的方向感知至关重要.
- 之前的结论表明,视网膜外信息是不必要的,这可能受到先前研究中使用的眼球运动速度极为缓慢的限制.
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