Motion perception: Seeing and deciding
Motion perception: Seeing and deciding
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DOI：
10.1073/pnas.93.2.628
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发表时间：
1996-01-23
影响因子：
11.1
通讯作者：
Newsome, WT
中科院分区：
文献类型：
--
作者：
Shadlen, MN;Newsome, WT
灵长类动物的视觉系统为研究认知的神经基础提供了前所未有的机会。即使是最简单的视觉辨别任务也需要处理感觉信号、形成决策和协调运动反应，以我们对灵长类视觉和眼动系统的广泛知识为基础，现在可以研究将感觉与行动联系起来的简单视觉决策的神经基础。在这里，我们描述了一项关于大脑皮质外侧顶内区域(LIP)神经反应的初步研究，当警觉的猴子在视觉显示中辨别运动方向时，一组LIP神经元携带的高级信号可能包括我们任务中决策过程的神经关联，这些信号既不是严格意义上的感觉也不是运动；相反，它们似乎反映了感觉信号的整合，以做出适合指导运动的决定。如果最终证明是这样的话，认知神经科学中的几个有趣的问题将受到严格的生理学审查。
The primate visual system offers unprecedented opportunities for investigating the neural basis of cognition. Even the simplest visual discrimination task requires processing of sensory signals, formation of a decision, and orchestration of a motor response, With our extensive knowledge of the primate visual and oculomotor systems as a base, it is now possible to investigate the neural basis of simple visual decisions that link sensation to action. Here we describe an initial study of neural responses in the lateral intraparietal area (LIP) of the cerebral cortex while alert monkeys discriminated the direction of motion in a visual display, A subset of LIP neurons carried high-level signals that may comprise a neural correlate of the decision process in our task, These signals are neither sensory nor motor in the strictest sense; rather they appear to reflect integration of sensory signals toward a decision appropriate for guiding movement. If this ultimately proves to be the case, several fascinating issues in cognitive neuroscience will be brought under rigorous physiological scrutiny.