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Neural underpinnings of contingency awareness in human fear conditioning.
- Source :
-
European Psychiatry . 2022 Supplement S1, Vol. 64, pS485-S486. 2p. - Publication Year :
- 2021
-
Abstract
- Introduction: The recognition of the conditioned-unconditioned stimulus (CS-US) association in classical conditioning is referred to as contingency awareness. The neural underpinnings of contingency awareness in human fear conditioning are poorly understood. Objectives: We aimed to explore the EEG correlates of contingency awareness. Methods: Here, we recorded electroencephalography (EEG) from a sample of 20 participants in a semantic conditioning experiment. In the acquisition phase the participants were presented with sequences of words from two semantic categories paired with tactile stimulation followed by presentation of a neutral sound (US-) ((e.g., animals -> left hand vibration -> US-, clothes -> right hand vibration -> US-). In the test phase the association violated in 50% of trials which followed by a presentation of a loud noise (US+). The participants were only instructed to listen carefully. On the basis of self-reported contingency awareness, twenty participants were divided in aware (N=12) and unaware (N=8) group. Results: The aware group expressed a non-lateralized effect of alpha-beta (12-23 Hz) suppression along with a more negative CNV at central channels preceding presentation of the vibration (main effect of Group). Also, CNV was more negative in expectation of US+ comparing with expectation of US- in the aware group but not in the unaware group. Conclusions: The results indicate that contingency awareness is accompanied by neural patterns reflecting expectation as can be seen in the suppression of somatosensory alpha-beta activity before expected presentation of the vibration as well as in CNV in expectation of an aversive event. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09249338
- Volume :
- 64
- Database :
- Academic Search Index
- Journal :
- European Psychiatry
- Publication Type :
- Academic Journal
- Accession number :
- 160598867
- Full Text :
- https://doi.org/10.1192/j.eurpsy.2021.1298