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

Visual guidance of smooth-pursuit eye movements: sensation, action, and what happens in between.
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DOI:
10.1016/j.neuron.2010.03.027
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发表时间:
2010-05-27
期刊:
影响因子:
16.2
通讯作者:
Lisberger, Stephen G.
Lisberger, Stephen G.
中科院分区:
医学1区
文献类型:
--
作者:
Lisberger, Stephen G.

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平滑的眼球追踪运动将 100 毫秒的视觉运动转化为平滑眼球运动的快速启动,然后持续准确的跟踪。视觉驱动的追踪响应的平均值和变化都可以通过平均调谐曲线和纹外视觉区域 MT 中视觉运动的感觉表示内的相关噪声的组合来解释。感觉运动和运动回路具有内务和调节功能,在小脑和额叶眼场的平滑眼球运动区域中实现。在大脑的这两个区域中,追逐的表现有很大不同,但这两个区域似乎都直接控制追逐,下游几乎没有或没有添加噪音。最后,追求表现出许多在短时间内发生的自愿特征。这些特征使追求成为理解大脑感觉运动处理一般特性的绝佳范例。
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 time scales. These features make pursuit an excellent exemplar for understanding the general properties of sensory-motor processing in the brain.
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