کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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930269 | 1474441 | 2012 | 10 صفحه PDF | دانلود رایگان |
There is suggestion that trait anxiety influences the processing of threat-related information. To test this hypothesis we recorded ERPs in response to subliminally presented and backward masked fearful and neutral faces, and non-face objects, in the preselected low- and high-anxious individuals. The amplitude of N170 was found to be larger when elicited by faces in comparison to non-faces, however it was not found to be emotion-sensitive or modulated by anxiety level. Differences between low- and high-anxious individuals appeared in a time window of the P1 component. At later stages, within the EPN component, stronger negativity specific for fearful faces was recorded exclusively in the low-anxious participants. Our findings indicate that anxiety level modulates early stages of information processing, as reflected in the P1 component. This leads to anxiety-related differences in involuntary emotional expression detection at later stages (EPN component).
► Faces evoke specific brain responses even in low awareness of the stimuli.
► Faces and non-faces are differentiated around 170 ms poststimulus.
► Facial emotions elicit stronger posterior negativity than neutral faces.
► Emotional expression processing is modulated by the level of trait anxiety.
Journal: International Journal of Psychophysiology - Volume 85, Issue 1, July 2012, Pages 27–36