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猴子初级视觉皮层(V1)中的图形-背景活动与行为反应速度相匹配。

Figure-ground activity in primary visual cortex (V1) of the monkey matches the speed of behavioral response.

作者信息

Supèr Hans, Spekreijse Henk, Lamme Victor A F

机构信息

Vision & Cognition Group, The Netherlands Ophthalmic Research Institute, and Department of Psychology, University of Amsterdam, The Netherlands.

出版信息

Neurosci Lett. 2003 Jun 26;344(2):75-8. doi: 10.1016/s0304-3940(03)00360-4.

Abstract

To look at an object its position in the visual scene has to be localized and subsequently appropriate oculo-motor behavior needs to be initiated. This kind of behavior is largely controlled by the cortical executive system, such as the frontal eye field. In this report, we analyzed neural activity in the visual cortex in relation to oculo-motor behavior. We show that in a figure-ground detection task, the strength of late modulated activity in the primary visual cortex correlates with the saccade latency. We propose that this may indicate that the variability of reaction times in the detection of a visual stimulus is reflected in low-level visual areas as well as in high-level areas.

摘要

为了观察一个物体,必须确定其在视觉场景中的位置,并随后启动适当的眼动行为。这种行为在很大程度上受皮质执行系统控制,比如额叶眼区。在本报告中,我们分析了与眼动行为相关的视觉皮质中的神经活动。我们发现,在一项图形-背景检测任务中,初级视觉皮质中晚期调制活动的强度与扫视潜伏期相关。我们提出,这可能表明视觉刺激检测中反应时间的变异性在低级视觉区域和高级区域中均有体现。

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