Fast backprojections from the motion to the primary visual area necessary for visual awareness
Fast backprojections from the motion to the primary visual area necessary for visual awareness
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DOI：
10.1126/science.1057099
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发表时间：
2001-04-20
期刊：
影响因子：
56.9
通讯作者：
Walsh, V
中科院分区：
文献类型：
--
作者：
Pascual-Leone, A;Walsh, V
关于从光感受器到大脑中更高视觉区域的通路，我们已经知道很多了。然而，我们如何意识到我们所看到的或已经看到的是一个神经科学所回避的问题。记录从猕猴V1在失活的MT+/V5和知觉整合的心理物理学研究表明，反馈从二级视觉区到V1是必要的视觉意识。我们使用经颅磁刺激来探测从人类区域MT+/V5到V1的反馈的时间和功能，并发现其作用对于视觉运动的意识是早期和关键的。
Much is known about the pathways from photoreceptors to higher visual areas in the brain. However, how we become aware of what we see or of having seen at all is a problem that has eluded neuroscience. Recordings from macaque V1 during deactivation of MT+/V5 and psychophysical studies of perceptual integration suggest that feedback from secondary visual areas to V1 is necessary for visual awareness. We used transcranial magnetic stimulation to probe the timing and function of feedback from human area MT+/V5 to V1 and found its action to be early and critical for awareness of visual motion.