Citation

Muench HM, Westermann S, Pizzagalli DA, Hofmann SG, Mueller EM. Biol. Psychol. 2016; 121(Pt B): 194-202.

Affiliation

Department of Psychology, University of Marburg, Gutenbergstr. 18, 35037 Marburg, Germany. Electronic address: muellererik@gmx.de.

Copyright

(Copyright © 2016, Elsevier Publishing)

DOI

10.1016/j.biopsycho.2016.07.017

PMID

27475476

Abstract

Anxiety states are characterized by attentional biases to threat and may show increased early brain responses to potentially threatening stimuli. How threatening stimuli are processed further depends on prior learning experiences (e.g. conditioning and extinction) and the context in which a stimulus appears. Whether context information and prior learning experiences interact with early threat processing in humans is unknown. Here, EEG was recorded while healthy participants (N=20) viewed faces that were fear-conditioned and/or extinguished 24h before. Faces were either passively viewed or presented within different contexts, which were created by describing scenarios that could either involve participants directly (self-threatening), or made them observers (other-threatening) of a potentially dangerous situation. Early brain responses (i.e., P1 amplitudes) were specifically enhanced during the self-threatening condition in response to non-extinguished versus extinguished fear-conditioned faces. This finding suggests that top-down contextual information is incorporated into early attention modulation of previously learned threat signals.

Copyright © 2016. Published by Elsevier B.V.

Language: en