Tolias A S, Moore T, Smirnakis S M, Tehovnik E J, Siapas A G, Schiller P H
Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Building E25, Room 634, Cambridge, MA 02139, USA.
Neuron. 2001 Mar;29(3):757-67. doi: 10.1016/s0896-6273(01)00250-1.
The receptive field, defined as the spatiotemporal selectivity of neurons to sensory stimuli, is central to our understanding of the neuronal mechanisms of perception. However, despite the fact that eye movements are critical during normal vision, the influence of eye movements on the structure of receptive fields has never been characterized. Here, we map the receptive fields of macaque area V4 neurons during saccadic eye movements and find that receptive fields are remarkably dynamic. Specifically, before the initiation of a saccadic eye movement, receptive fields shrink and shift towards the saccade target. These spatiotemporal dynamics may enhance information processing of relevant stimuli during the scanning of a visual scene, thereby assisting the selection of saccade targets and accelerating the analysis of the visual scene during free viewing.
感受野被定义为神经元对感觉刺激的时空选择性，它对于我们理解感知的神经元机制至关重要。然而，尽管眼球运动在正常视觉过程中至关重要，但眼球运动对感受野结构的影响从未被描述过。在这里，我们绘制了猕猴V4区神经元在扫视眼动过程中的感受野，发现感受野具有显著的动态变化。具体来说，在扫视眼动开始之前，感受野会缩小并向扫视目标移动。这些时空动态变化可能会在视觉场景扫描过程中增强相关刺激的信息处理，从而有助于扫视目标的选择，并在自由观看时加速视觉场景的分析。
