Visual Awareness, Emotion, and Gamma Band Synchronization

被引：93

作者：

Luo, Qian ^{[1
]}

Mitchell, Derek ^{[1
]}

Cheng, Xi ^{[2
]}

Mondillo, Krystal ^{[1
]}

Mccaffrey, Daniel ^{[1
]}

Holroyd, Tom ^{[3
]}

Carver, Frederick ^{[3
]}

Coppola, Richard ^{[3
]}

Blair, James ^{[1
]}

机构：

[1] NIMH, Mood & Anxiety Disorders Program, Bethesda, MD 20892 USA

[2] NIMH, Genes Cognit & Psychosis Program, Bethesda, MD 20892 USA

[3] NIMH, MEG Core Facil, Bethesda, MD 20892 USA

来源：

CEREBRAL CORTEX | 2009年 / 19卷 / 08期

关键词：

consciousness; emotion; gamma; MEG; synchronization; visual awareness; TASK-RELATED CHANGES; CORTICAL SYNCHRONIZATION; FACIAL EXPRESSIONS; BOLD RESPONSE; CORTEX; EEG; CONSCIOUSNESS; MODULATION; ATTENTION; DYNAMICS;

D O I：

10.1093/cercor/bhn216

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

What makes us become aware? A popular hypothesis is that if cortical neurons fire in synchrony at a certain frequency band (gamma), we become aware of what they are representing. We tested this hypothesis adopting brain-imaging techniques with good spatiotemporal resolution and frequency-specific information. Specifically, we examined the degree to which increases in event-related synchronization (ERS) in the gamma band were associated with awareness of a stimulus (its detectability) and/or the emotional content of the stimulus. We observed increases in gamma band ERS within prefrontal-anterior cingulate, visual, parietal, posterior cingulate, and superior temporal cortices to stimuli available to conscious awareness. However, we also observed increases in gamma band ERS within the amygdala, visual, prefrontal, parietal, and posterior cingulate cortices to emotional relative to neutral stimuli, irrespective of their availability to conscious access. This suggests that increased gamma band ERS is related to, but not sufficient for, consciousness.

引用

页码：1896 / 1904

页数：9

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