Neuronal activity in human primary visual cortex correlates with perception during binocular rivalry
Neuronal activity in human primary visual cortex correlates with perception during binocular rivalry
复制标题
DOI：
10.1038/80676
复制
发表时间：
2000-11-01
影响因子：
25
通讯作者：
Heeger, DJ
中科院分区：
文献类型：
--
作者：
Polonsky, A;Blake, R;Heeger, DJ
在双眼竞争中，两个不相容的单目图像争夺知觉优势，其中一个模式暂时从意识中被抑制。当受试者观看两种不同对比度的相互竞争的双眼图像时，我们测量了早期视觉皮质中的fMRI信号；对比度差异作为两个单目图像的神经元表示的“标签”。当受试者感知到高对比度模式时，初级视皮层(V1)的活动增加，而当受试者感知到低对比度模式时，初级视皮层(V1)的活动减少。在竞争过程中，V1活动的这些波动大约是通过交替呈现两个没有竞争的单目图像所引起的波动的55%。与竞争相关的V1活动波动与其他视觉区域(V2、V3、V3a和V4V)的波动大致相同。这些结果挑战了这样一种观点，即双眼竞争的神经元机制主要发生在较晚的视觉区域。
During binocular rivalry, two incompatible monocular images compete for perceptual dominance, with one pattern temporarily suppressed from conscious awareness. We measured fMRI signals in early visual cortex while subjects viewed rival dichoptic images of two different contrasts; the contrast difference served as a 'tag' for the neuronal representations of the two monocular images. Activity in primary visual cortex (V1) increased when subjects perceived the higher contrast pattern and decreased when subjects perceived the lower contrast pattern. These fluctuations in V1 activity during rivalry were about 55% as large as those evoked by alternately presenting the two monocular images without rivalry. The rivalry-related fluctuations in V1 activity were roughly equal to those observed in other visual areas (V2, V3, V3a and V4v). These results challenge the view that the neuronal mechanisms responsible for binocular rivalry occur primarily in later visual areas.