Compression and reflection of visually evoked cortical waves
Compression and reflection of visually evoked cortical waves
复制标题
DOI：
10.1016/j.neuron.2007.06.016
复制
发表时间：
2007-07-05
期刊：
影响因子：
16.2
通讯作者：
Wu, Jian-young
中科院分区：
文献类型：
--
作者：
Xu, Weifeng;Huang, Xiaoying;Wu, Jian-young
Neuronal interactions between primary and secondary visual cortical areas are important for visual processing, but the spatiotemporal patterns of the interaction are not well understood. We used voltage-sensitive dye imaging to visualize neuronal activity in rat visual cortex and found visually evoked waves propagating from V1 to other visual areas. A primary wave originated in the monocular area of V1 and was "compressed" when propagating to V2. A reflected wave initiated after compression and propagated backward into V1. The compression occurred at the V1/V2 border, and local GABAA inhibition is important for the compression. The compression/reflection pattern provides a two-phase modulation: V1 is first depolarized by the primary wave, and then V1 and V2 are simultaneously depolarized by the reflected and primary waves, respectively. The compression/reflection pattern only occurred for evoked waves and not for spontaneous waves, suggesting that it is organized by an internal mechanism associated with visual processing.
