Bullier J, Hupé J M, James A, Girard P
INSERM U371, Bron, France.
J Physiol Paris. 1996;90(3-4):217-20. doi: 10.1016/s0928-4257(97)81426-x.
The role of feedback connections from area V2 to V1 was studied by reversible inactivation. When V2 was inactivated the responses of some V1 neurons to stimulation of the surround region were increased while responses to center stimulation were unchanged or decreased. Latencies to small flashing stimuli were also compared in areas V1 and V2. The distributions in the two areas overlap largely, with a 10 ms shift between the two. Neurons of V1 and V2 that are driven by the magnocellular layers of the LGN are activated 20 ms earlier than neurons of the parvocellular stream.
通过可逆失活研究了从V2区到V1区的反馈连接的作用。当V2区失活时，一些V1神经元对周围区域刺激的反应增强，而对中心刺激的反应不变或减弱。还比较了V1区和V2区对小闪光刺激的潜伏期。两个区域的分布在很大程度上重叠，两者之间有10毫秒的偏移。由外侧膝状体大细胞层驱动的V1和V2神经元比小细胞流的神经元早20毫秒被激活。
