视皮层
神经科学
神经活动
心理学
大脑活动与冥想
N2pc
运动前神经元活动
视觉感受
刺激(心理学)
视觉搜索
计算机科学
视觉系统
认知心理学
感知
脑电图
作者
David Ress,Benjamin T. Backus,David J. Heeger
摘要
Visual attention can affect both neural activity and behavior in humans. To quantify possible links between the two, we measured activity in early visual cortex (V1, V2 and V3) during a challenging pattern-detection task. Activity was dominated by a large response that was independent of the presence or absence of the stimulus pattern. The measured activity quantitatively predicted the subject's pattern-detection performance: when activity was greater, the subject was more likely to correctly discern the presence or absence of the pattern. This stimulus-independent activity had several characteristics of visual attention, suggesting that attentional mechanisms modulate activity in early visual cortex, and that this attention-related activity strongly influences performance.
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