What can functional imaging reveal about the role of attention in visual awareness?

被引:85
作者
Rees, G
Lavie, N
机构
[1] UCL, Inst Cognit Neurosci, London WC1N 3AR, England
[2] UCL, Inst Neurol, Wellcome Dept Cognit Neurol, London WC1N 3BG, England
[3] UCL, Dept Psychol, London WC1E 6BT, England
基金
英国惠康基金; 英国医学研究理事会; 英国生物技术与生命科学研究理事会;
关键词
functional imaging; selective attention; vision; visual awareness; functional MRI;
D O I
10.1016/S0028-3932(01)00122-1
中图分类号
B84 [心理学]; C [社会科学总论]; Q98 [人类学];
学科分类号
03 ; 0303 ; 030303 ; 04 ; 0402 ;
摘要
This review focuses on neuroimaging studies that address the relationship between selective attention, neural activity and visual awareness. Withdrawing attention from particular visual stimuli reduces modality-specific processing in posterior visual cortex, and when attention is fully engaged elsewhere, even highly salient but task-irrelevant stimuli can fail to evoke activity and reach awareness. However. the link between visual attention and awareness extends beyond posterior visual cortex to also encompass regions of parietal and prefrontal cortex. Activity in the posterior visual cortex may be necessary but not sufficient for awareness, without a contribution from frontal and parietal cortex. Consistent with this, enhanced interactions between parietal, frontal and posterior visual cortex are observed as a function of both visual attention and visual awareness, and lesions of parietal cortex disrupt both visual attention and awareness. Taken together. these data suggest that distributed interactions between modality-specific posterior visual cortex and frontoparietal areas subserve both visual attention and visual awareness. (C) 2001 Published by Elsevier Science Ltd.
引用
收藏
页码:1343 / 1353
页数:11
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