平滑追踪眼球运动的视觉引导：感觉、动作以及两者之间的关系。

Visual guidance of smooth-pursuit eye movements: sensation, action, and what happens in between.

机构信息

Howard Hughes Medical Institute, Department of Physiology, and W.M. Keck Foundation Center for Integrative Neuroscience, University of California, San Francisco, San Francisco, CA 94143-0444, USA.

出版信息

Neuron. 2010 May 27;66(4):477-91. doi: 10.1016/j.neuron.2010.03.027.

Smooth-pursuit eye movements transform 100 ms of visual motion into a rapid initiation of smooth eye movement followed by sustained accurate tracking. Both the mean and variation of the visually driven pursuit response can be accounted for by the combination of the mean tuning curves and the correlated noise within the sensory representation of visual motion in extrastriate visual area MT. Sensory-motor and motor circuits have both housekeeping and modulatory functions, implemented in the cerebellum and the smooth eye movement region of the frontal eye fields. The representation of pursuit is quite different in these two regions of the brain, but both regions seem to control pursuit directly with little or no noise added downstream. Finally, pursuit exhibits a number of voluntary characteristics that happen on short timescales. These features make pursuit an excellent exemplar for understanding the general properties of sensory-motor processing in the brain.

平滑追踪眼动将 100 毫秒的视觉运动转化为快速启动平滑眼动，随后进行持续准确的追踪。外纹状视觉区 MT 中视觉运动的感觉代表内的平均调谐曲线和相关噪声，可以解释视觉驱动的追踪反应的平均值和变化。感觉运动和运动回路都具有维持和调节功能，分别由小脑和额眼区的平滑眼动区实现。在大脑的这两个区域中，追踪的表现方式截然不同，但这两个区域似乎都在没有或很少添加下游噪声的情况下直接控制追踪。最后，追踪表现出许多短时间尺度上的自愿特征。这些特征使追踪成为理解大脑中感觉运动处理的一般特性的极好范例。