Tipper S P, Howard L A, Paul M A
Centre for Cognitive Neuroscience, School of Psychology, University of Wales, Bangor, UK.
Exp Brain Res. 2001 Jan;136(2):241-9. doi: 10.1007/s002210000577.
The pre-motor theory suggests that, when attention is oriented to a location, the motor systems that are involved in achieving current behavioural goals are activated. For example, when a task requires accurate reaching, attention to a location activates the motor circuits controlling saccades and manual reaches. These actions involve separate neural systems for the control of eye and hand, but we believe that the selection processes acting on neural population codes within these systems are similar and can affect each other. The attentional effect can be revealed in the subsequent movement. The present study shows that the path the eye takes as it saccades to a target is affected by whether a reach to the target is also produced. This effect is interpreted as the influence of a hand-centred frame used in reaching on the spatial frame of reference required for the saccade.
运动前理论认为，当注意力指向某个位置时，参与实现当前行为目标的运动系统会被激活。例如，当一项任务需要精确伸手够物时，对某个位置的注意力会激活控制扫视和手动够物的运动回路。这些动作涉及控制眼睛和手部的不同神经系统，但我们认为作用于这些系统内神经群体编码的选择过程是相似的，并且可以相互影响。注意力效应可以在随后的运动中显现出来。本研究表明，眼睛向目标扫视时所采取的路径会受到是否同时也向该目标伸手够物的影响。这种效应被解释为伸手够物时使用的以手部为中心的框架对扫视所需的空间参照框架的影响。
