Motion perception: Seeing and deciding

被引:472
作者
Shadlen, MN [1 ]
Newsome, WT [1 ]
机构
[1] STANFORD UNIV,SCH MED,DEPT NEUROBIOL,STANFORD,CA 94305
关键词
motion perception; psychophysics; decision making; parietal cortex;
D O I
10.1073/pnas.93.2.628
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
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.
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页码:628 / 633
页数:6
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