Pattern-motion responses in human visual cortex
Pattern-motion responses in human visual cortex
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DOI：
10.1038/nn774
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发表时间：
2002-01-01
影响因子：
25
通讯作者：
Heeger, DJ
中科院分区：
文献类型：
--
作者：
Huk, AC;Heeger, DJ
视觉运动处理的生理模型假设“模式运动细胞”代表运动物体的方向，与其特定的空间模式无关。我们进行了功能磁共振成像实验来识别人脑中对模式运动有选择性的神经元活动。使用适应移动“格子”刺激的协议使我们能够将模式运动反应与同一大脑结构内其他类型的运动相关活动分开，并揭示了人类视觉区域 MT+ 中强大的模式运动选择性。降低格子的感知一致性会导致图案运动响应度相应降低，这提供了证据表明连贯运动的感知与人类 MT+ 中图案运动细胞的活动密切相关。
Physiological models of visual motion processing posit that 'pattern-motion cells' represent the direction of moving objects independent of their particular spatial pattern. We performed fMRI experiments to identify neuronal activity in the human brain selective for pattern motion. A protocol using adaptation to moving 'plaid' stimuli allowed us to separate pattern-motion responses from other types of motion-related activity within the same brain structures, and revealed strong pattern-motion selectivity in human visual area MT+. Reducing the perceptual coherence of the plaids yielded a corresponding decrease in pattern-motion responsivity, providing evidence that percepts of coherent motion are closely linked to the activity of pattern-motion cells in human MT+.