Tracing the timing of human analysis of motion and chromatic signals from occipital to temporo-parieto-occipital cortex: A transcranial magnetic stimulation study

被引：27

作者：

Anand, S

Olson, JD

Hotson, JR ^{[1
]}

机构：

[1] Stanford Univ, Dept Neurol & Neurol Sci, Stanford, CA 94305 USA

[2] Santa Clara Valley Med Ctr, Calif Inst Med Res, San Jose, CA 95128 USA

来源：

VISION RESEARCH | 1998年 / 38卷 / 17期

基金：

美国国家卫生研究院;

关键词：

color; extrastriate; motion; striate cortex; transcranial magnetic stimulation;

D O I：

10.1016/S0042-6989(98)00025-X

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

In human visual analysis, the initial processing of motion and chromatic signals may be mediated by feed-forward pathways from striate cortex to segregated areas of extrastriate cortex. The time-course of occipital to temporo-parieto-occipital motion processing was unknown, as was the selectivity of the effect of transcranial magnetic stimulation (TMS) on motion processing. TMS delivered over occipital cortex degraded the discrimination of motion-defined form (MDF) in a discrete time window beginning 100-120 ms from the onset of the visual stimulus. Bilateral focal TMS delivered over the temporo-parieto-occipital junction (TPO) disrupted the discrimination of MDF in a time window beginning 20-40 ms later than the effect of TMS delivered over occipital cortex. Bilateral focal TMS delivered over TPO also degraded the discrimination of CDF, motion direction, and color. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：2619 / 2627

页数：9

共 54 条

[21] TRANSCRANIAL MAGNETIC STIMULATION OF EXTRASTRIATE CORTEX DEGRADES HUMAN MOTION DIRECTION DISCRIMINATION [J].