期刊
PSYCHOPHYSIOLOGY
卷 47, 期 3, 页码 435-441出版社
WILEY-BLACKWELL PUBLISHING, INC
DOI: 10.1111/j.1469-8986.2009.00946.x
关键词
Smoking; Attention; ERP; P3; Startle; Emotion
资金
- NIH [1R01DA017073-01]
Before starting a smoking cessation treatment, 51 smokers took part in a study aimed at investigating brain mechanisms associated with attention allocation. Event-related potentials to acoustic startle probes were recorded from 129 sensors during the presentation of neutral, pleasant, unpleasant, and cigarette-related pictures. Results indicated that the amplitude of the startle probe P3 component was reduced for pleasant, unpleasant, and cigarette-related conditions relative to neutral. Surface Laplacian estimates showed that sources of electrocortical activity under frontal and parietal sensors contributed to the modulation of this effect. For smokers, cigarette-related stimuli, like intrinsically motivating ones, capture attentional resources and therefore reduce the ability to process competing stimuli. The depletion of attentional resources in the presence of cigarette-related cues may contribute to the high relapse rate observed during attempts to quit smoking.
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