Eye-hand coordination: saccades are faster when accompanied by a coordinated arm movement.
Eye-hand coordination: saccades are faster when accompanied by a coordinated arm movement.
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DOI：
10.1152/jn.00854.2001
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发表时间：
2002-05
影响因子：
2.5
通讯作者：
L. Snyder;J. L. Calton;Anthony R. Dickinson;B. Lawrence
中科院分区：
文献类型：
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作者：
L. Snyder;J. L. Calton;Anthony R. Dickinson;B. Lawrence
当灵长类动物伸手去拿一个物体时，它们通常也会将眼球运动指向该物体。这种将眼睛和肢体运动指向同一物体的模式似乎是眼手协调的基础。我们研究了恒河猴模型系统中眼跳和伸手运动之间的相互作用。孤立眼动的振幅和峰值速度彼此呈正相关。这种关系称为主序。我们现在报告的主要序列关系扫视是在协调的眼睛和手臂运动的变化。特别地，当扫视伴随有协调的手臂运动时，对于相同大小的扫视，峰值眼睛速度快约4%。扫视持续时间减少了等量。当手臂同时移动但方向与眼睛相反时，主序列关系是不受干扰的，这表明眼睛和手臂的运动必须紧密协调才能产生效果。调节这种相互作用的候选区域包括后顶叶皮层和上级丘。
When primates reach for an object, they very often direct an eye movement toward the object as well. This pattern of directing both eye and limb movements to the same object appears to be fundamental to eye-hand coordination. We investigated interactions between saccades and reaching movements in a rhesus monkey model system. The amplitude and peak velocity of isolated eye movements are positively correlated with one another. This relationship is called the main sequence. We now report that the main sequence relationship for saccades is changed during coordinated eye and arm movements. In particular, peak eye velocity is approximately 4% faster for the same size saccade when the saccade is accompanied by a coordinated arm movement. Saccade duration is reduced by an equivalent amount. The main sequence relationship is unperturbed when the arm moves simultaneously but in the opposite direction as the eyes, suggesting that eye and arm movements must be tightly coordinated to produce the effect. Candidate areas mediating this interaction include the posterior parietal cortex and the superior colliculus.