期刊
NEUROPSYCHOLOGIA
卷 49, 期 5, 页码 1363-1368出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.neuropsychologia.2011.02.049
关键词
Amygdala; Anxiety; Attention; Fearful faces; Perceptual load; Prefrontal cortices
资金
- National Institute of Mental Health (NIMH)
Amygdala reactivity to threat-related distractor stimuli can be abolished in perceptually demanding contexts. Premised on the biological imperative to respond swiftly to threat, we demonstrate, however, that when participants are threatened by shock, greater amygdala responses to fearful compared to neutral distractor faces is preserved under conditions of high attentional demand. Lateral prefrontal cortices also showed selective responding to fearful distractor faces under these conditions, suggesting that threat-related distractor stimuli engaged attentional control mechanisms. We conclude that anxiety elicited by looming threat promotes neurocognitive processes that broaden attention and enhance sensitivity to potential danger cues, even when perceptual systems are taxed. Published by Elsevier Ltd.
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