COORDINATION OF ARM AND EYE-MOVEMENTS IN TRACKING OF SINUSOIDALLY MOVING TARGETS
COORDINATION OF ARM AND EYE-MOVEMENTS IN TRACKING OF SINUSOIDALLY MOVING TARGETS
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DOI：
10.1016/0166-4328(87)90247-6
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发表时间：
1987-05-01
影响因子：
2.7
通讯作者：
BOCK, O
中科院分区：
文献类型：
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作者：
BOCK, O
在没有手臂视觉反馈的情况下，人类受试者用手臂和眼睛跟踪正弦移动的视觉目标。由此产生的频率响应表明预测机制涉及手臂和眼睛跟踪，并且各自的频率上限相似。最重要的是，观察到手臂和眼睛性能之间的显着差异：（1）在低频下，手臂的增益（而不是眼睛运动的增益）始终小于 0 dB。 (2) 在较高频率下，臂增益而非眼增益表现出明显的幅度非线性。 (3)试验内手臂运动的增益和相位变异性与眼动的各自变异性不相关。 (4) 手臂和眼睛对目标参数突然变化的反应时间可能有很大不同，并且它们的试验间变异性不相关或仅轻微相关。总而言之，这些发现强烈表明，我们实验中控制预测性手臂和眼睛运动的机制主要部分组织在独立、并行的通道中。参考一个简单的眼臂协调方案讨论了结果。
Human subjects tracked sinusoidally moving visual targets with arm and eyes, in absence of visual feedback of the arm. The resulting frequency responses indicated that predictive mechanisms are involved both in arm and in eye tracking, and that the respective upper frequency limits are similar. Most importantly, substantial differences between arm and eye performance were observed: (1) At low frequencies the gain of arm, but not of eye movement was consistently smaller than 0 dB. (2) At higher frequencies, arm, but not eye gain exhibited a marked amplitude non-linearity. (3) The intra-trial gain and phase variability of arm movement was not correlated with the respective variability of eye movement. (4) The reaction times to sudden changes of target parameters could be considerably different for arm and eye, and their inter-trial variability was not, or only marginally, correlated. Taken together, these findings strongly suggest that the mechanisms controlling predictive arm and eye movements in our experiment are organized to a major part in independent, parallel channels. The results are discussed with reference to a simple scheme of eye-arm coordination.