Speed-dependent motion-sensitive responses in V5: An fMRI study

被引：70

作者：

Chawla, D ^{[1
]}

Phillips, J ^{[1
]}

Buechel, C ^{[1
]}

Edwards, R ^{[1
]}

Friston, KJ ^{[1
]}

机构：

[1] Inst Neurol, Wellcome Dept Cognit Neurol, Leopold Muller Funct Imaging Lab, London WC1N 3BG, England

来源：

NEUROIMAGE | 1998年 / 7卷 / 02期

基金：

英国惠康基金;

关键词：

V5; V3a; isoluminant; isochromatic; fMRI; visual motion; speed;

D O I：

10.1006/nimg.1997.0319

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

This fMRI study examined motion-sensitive responses in human area V5 as a function of stimulus speed. Consistent with electrophysiological findings, we observed optimal responses at intermediate speeds of around 7 degrees/s to 30 degrees/s. The results are consistent with a nonlinear (inverted "U") dependency on speed that was also observed in V3a. V1 activation was observed to decrease linearly as speed increased. This is consistent with the fact that speed-sensitive cells in V1 have been shown to be tuned to much slower speeds than in V5. (C) 1998 Academic Press.

引用

页码：86 / 96

页数：11

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