在猴初级视觉皮层（V1）中观察到两种不同的感觉处理模式。

Two distinct modes of sensory processing observed in monkey primary visual cortex (V1).

作者信息

Supèr H, Spekreijse H, Lamme V A

机构信息

Graduate School of Neurosciences, Department of Visual System Analysis, AMC, University of Amsterdam, PO Box 12011, 1100 AA Amsterdam, The Netherlands.

出版信息

Nat Neurosci. 2001 Mar;4(3):304-10. doi: 10.1038/85170.

DOI:10.1038/85170

PMID:11224548

Abstract

Even salient sensory stimuli are sometimes not detected. What goes wrong in the brain in that case? Here we show that a late (> 100-ms) component of the neural activity in the primary visual cortex of the monkey is selectively suppressed when stimuli are not seen. As there is evidence that this activity depends on feedback from extrastriate areas, these findings suggest a specific role for recurrent processing when stimuli are reaching a perceptual level. Further results show that this perceptual level is situated between purely sensory and decision or motor stages of processing.

摘要

即使是显著的感觉刺激有时也会未被察觉。在这种情况下大脑哪里出了问题呢？在此我们表明，当刺激未被看见时，猴子初级视觉皮层中神经活动的一个晚期（>100毫秒）成分会被选择性抑制。由于有证据表明这种活动依赖于纹外区域的反馈，这些发现提示了在刺激达到知觉水平时循环处理的一个特定作用。进一步的结果表明，这个知觉水平处于纯粹感觉与决策或运动处理阶段之间。