Westwood David A, Robertson Christopher, Heath Matthew
School of Health and Human Performance, Dalhousie University, Halifax, NS, Canada, B3H 3J5.
Brain Cogn. 2005 Apr;57(3):257-60. doi: 10.1016/j.bandc.2004.08.055.
Evidence suggests that perceptual networks in the ventral visual pathway are necessary for action control when targets are viewed with only one eye, or when the target must be stored in memory. We tested whether memory-linked (i.e., open-loop versus memory-guided actions) and monocular-linked effects (i.e., binocular versus monocular actions) on action arise from a common mechanism as suggested by evidence from neuropsychology and psychophysics. Participants viewed targets with either one eye or two (vision: monocular versus binocular) and then reached to touch targets in open-loop and memory-guided conditions (condition: open-loop versus 0, 500, 1000, and 1500 ms delays). Results showed that memory-linked and monocular-linked increases in radial and variable movement error were additive (i.e., main effects of vision and condition, but no interaction). This suggests that the two effects on visuomotor control arise from separate mechanisms, in contrast to evidence from psychophysics and neuropsychology suggesting a common underlying mechanism.
有证据表明，当只用一只眼睛观察目标，或者当目标必须存储在记忆中时，腹侧视觉通路中的感知网络对于动作控制是必要的。我们测试了动作中与记忆相关的效应（即开环动作与记忆引导动作）和与单眼相关的效应（即双眼动作与单眼动作）是否如神经心理学和心理物理学证据所表明的那样，源自共同机制。参与者用一只眼睛或两只眼睛观察目标（视觉：单眼与双眼），然后在开环和记忆引导条件下伸手触摸目标（条件：开环与0、500、1000和1500毫秒延迟）。结果表明，与记忆相关和与单眼相关的径向和可变运动误差增加是相加的（即视觉和条件的主效应，但无交互作用）。这表明对视觉运动控制的这两种效应源自不同机制，这与心理物理学和神经心理学证据表明存在共同潜在机制形成对比。
