An Eye in the Palm of Your Hand: Alterations in Visual Processing Near the Hand, a Mini-Review.
An Eye in the Palm of Your Hand: Alterations in Visual Processing Near the Hand, a Mini-Review.
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DOI：
10.3389/fncom.2016.00037
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发表时间：
2016
影响因子：
3.2
通讯作者：
Fallah M
中科院分区：
文献类型：
--
作者：
Perry CJ;Amarasooriya P;Fallah M
眼动系统内的反馈改善眼动终点处的视觉处理，也称为视觉抓握。我们不只是看到我们周围的世界，我们也伸出手去抓东西。越来越多的文献表明，近手空间的视觉处理是改变的。控制眼睛或手运动的系统依赖于额顶叶区域的平行网络，这些区域与视觉区域有反馈联系。由于眼神经系统对视觉处理的影响是通过反馈发生的，通过运动计划和运动传出复制，一个平行的系统，其中达到和/或抓住运动相关的活动也影响视觉处理是可能的。例如，后顶叶皮层的区域接收用于指导动作的本体感受和视觉信息，以及运动传出信号。这三个信息通道是产生与到达相关的视觉注意的空间分配所必需的。我们回顾了来自行为和神经生理学研究的证据，这些证据支持这样一个假设，即来自伸手和/或抓握运动控制网络的反馈会影响视觉处理，同时注意到它与眼神经系统内所见的反馈不同的方式。我们还建议，对象启示可能代表的神经机制，通过该机制，当刺激靠近手时，某些对象的功能被选择用于优先处理。最后，我们总结了两个基于效应器的反馈系统，并讨论了如何有单独的，但平行的效应器系统允许有效的解耦的眼睛和手的运动。
Feedback within the oculomotor system improves visual processing at eye movement end points, also termed a visual grasp. We do not just view the world around us however, we also reach out and grab things with our hands. A growing body of literature suggests that visual processing in near-hand space is altered. The control systems for moving either the eyes or the hands rely on parallel networks of fronto-parietal regions, which have feedback connections to visual areas. Since the oculomotor system effects on visual processing occur through feedback, both through the motor plan and the motor efference copy, a parallel system where reaching and/or grasping motor-related activity also affects visual processing is likely. Areas in the posterior parietal cortex, for example, receive proprioceptive and visual information used to guide actions, as well as motor efference signals. This trio of information channels is all that would be necessary to produce spatial allocation of reach-related visual attention. We review evidence from behavioral and neurophysiological studies that support the hypothesis that feedback from the reaching and/or grasping motor control networks affects visual processing while noting ways in which it differs from that seen within the oculomotor system. We also suggest that object affordances may represent the neural mechanism through which certain object features are selected for preferential processing when stimuli are near the hand. Finally, we summarize the two effector-based feedback systems and discuss how having separate but parallel effector systems allows for efficient decoupling of eye and hand movements.