期刊
PSYCHOPHYSIOLOGY
卷 41, 期 4, 页码 613-624出版社
WILEY
DOI: 10.1111/j.1469-8986.2004.00186.x
关键词
pain; attention; anterior cingulate cortex; somatosensory-evoked potential; orienting
资金
- NINDS NIH HHS [NS35810] Funding Source: Medline
This study examined the effects of distraction on pain-evoked activity in the anterior cingulate cortex (ACC). Twenty-eight healthy adults were given painful electrical stimulation of the sural nerve during an attend condition, where they rated the subjective magnitude of each electrical stimulus, and during a distraction condition, where they performed an arithmetic distraction task. The magnitude of the pain-evoked ACC activity was estimated from the dipole source localization analysis of the somatosensory evoked potential. Subjective pain ratings were smaller and pain-evoked ACC activity was larger during the distraction condition than during the attend condition. Recent regional cerebral blood flow studies have also reported a distraction-related increase in pain-evoked ACC activity. Our results confirm these reports, and verify that the distraction effect specifically involves pain-evoked ACC activity. The cognitive demands of the distraction task present the possibility that the pain-evoked ACC activity might be involved, at least in part, in response competition and/or orienting attention toward painful stimuli.
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