Human brain activity during spontaneously reversing perception of ambiguous figures

被引：244

作者：

Kleinschmidt, A ^{[1
]}

Büchel, C ^{[1
]}

Zeki, S ^{[1
]}

Frackowiak, RSJ ^{[1
]}

机构：

[1] Inst Neurol, Wellcome Dept Cognit Neurol, London WC1N 3BG, England

来源：

PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES | 1998年 / 265卷 / 1413期

基金：

英国惠康基金;

关键词：

visual system; human brain; perceptual rivalry; bistable percepts; visual awareness; functional magnetic resonance imaging;

D O I：

10.1098/rspb.1998.0594

中图分类号：

Q [生物科学];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Looking at ambiguous figures results in rivalry with spontaneous alternation between two percepts. Using event-related functional magnetic resonance imaging, we localized transient human brain activity changes during perceptual reversals. Activation occurred in ventral occipital and intraparietal higher-order visual areas, deactivation in primary visual cortex and the pulvinar. Thus, without any physical stimulus changes, salient perceptual flips briefly engage widely separated specialized cortical areas, but are also associated with intermittent activity breakdown in structures putatively maintaining perceptual stability. Together, the dynamics of integrative perceptual experience are reflected in rapid spatially differentiated activity modulation within a cooperative set of neural structures.

引用

页码：2427 / 2433

页数：7

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