Defensive engagement and perceptual enhancement

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2010
Autor:innen
Keil, Andreas
Bradley, Margaret M.
Vila, Jaime
Guerra, Pedro
Lang, Peter J.
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Erschienen in
Neuropsychologia ; 48 (2010), 12. - S. 3580-3584. - ISSN 0028-3932. - eISSN 1873-3514
Zusammenfassung
We tested whether visual cortical sensitivity to external cues in the context of an acute defensive reaction is heightened or attenuated. A strong cardiac defense (fear) response was elicited by presenting an abrupt, loud acoustic stimulus following a 10-min period of quiescence. Electrocortical responses to aversive and neutral pictures following defensive stimulus onset were measured using dense-array EEG. Pictures were flickered at 12.5 Hz to evoke steady-state visual evoked potentials (ssVEP), which can be reliably extracted on the basis of single trials. Visual cortical activity indexing perceptual processing was substantially heightened when pictures were shown in temporal proximity to (i.e., 5 s after) the defense stimulus. Replicating previous studies, aversive visual stimuli were associated with enhanced ssVEP amplitude, compared to neutral stimuli. Acute defense facilitates visual perception of external cues and preserves accurate discrimination between threatening and safe cues.
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Fachgebiet (DDC)
150 Psychologie
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Human,Dense-array EEG,Cardiac defense,Emotion,Steady-state potential
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Zitieren
ISO 690KEIL, Andreas, Margaret M. BRADLEY, Niklas IHSSEN, Sabine HEIM, Jaime VILA, Pedro GUERRA, Peter J. LANG, 2010. Defensive engagement and perceptual enhancement. In: Neuropsychologia. 48(12), pp. 3580-3584. ISSN 0028-3932. eISSN 1873-3514. Available under: doi: 10.1016/j.neuropsychologia.2010.08.007
BibTex
@article{Keil2010-10Defen-12803,
  year={2010},
  doi={10.1016/j.neuropsychologia.2010.08.007},
  title={Defensive engagement and perceptual enhancement},
  number={12},
  volume={48},
  issn={0028-3932},
  journal={Neuropsychologia},
  pages={3580--3584},
  author={Keil, Andreas and Bradley, Margaret M. and Ihssen, Niklas and Heim, Sabine and Vila, Jaime and Guerra, Pedro and Lang, Peter J.}
}
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