Delayed striate cortical activation during spatial attention

被引：221

作者：

Noesselt, T ^{[1
]}

Hillyard, SA

Woldorff, MG

Schoenfeld, A

Hagner, T

Jäncke, L

Tempelmann, C

Hinrichs, H

Heinze, HJ

机构：

[1] Otto von Guericke Univ, Dept Neurol 2, D-39120 Magdeburg, Germany

[2] Otto von Guericke Univ, Inst Gen Psychol, D-39120 Magdeburg, Germany

[3] Univ Calif San Diego, Dept Neurosci, La Jolla, CA 92093 USA

[4] Duke Univ, Ctr Cognit Neurosci, Durham, NC 27708 USA

[5] Duke Univ, Dept Psychol & Brain Sci, Durham, NC 27708 USA

来源：

NEURON | 2002年 / 35卷 / 03期

关键词：

D O I：

10.1016/S0896-6273(02)00781-X

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

Recordings of event-related potentials (ERPs) and event-related magnetic fields (ERMFs) were combined with functional magnetic resonance imaging (fMRI) to study visual cortical activity in humans during spatial attention. While subjects attended selectively to stimulus arrays in one visual field, fMRI revealed stimulus-related activations in the contralateral primary visual cortex and in multiple extrastriate areas. ERP and ERMF recordings showed that attention did not affect the initial evoked response at 60-90 ms poststimulus that was localized to primary cortex, but a similarly localized late response at 140-250 ms was enhanced to attended stimuli. These findings provide evidence that the primary visual cortex participates in the selective processing of attended stimuli by means of delayed feedback from higher visual-cortical areas.

引用

页码：575 / 587

页数：13