Alpha-band EEG suppression as a neural marker of sustained attentional engagement to conditioned threat stimuli.
EEG
SCR
alpha
attention
aversive
conditioning
fear
threat
Journal
Social cognitive and affective neuroscience
ISSN: 1749-5024
Titre abrégé: Soc Cogn Affect Neurosci
Pays: England
ID NLM: 101288795
Informations de publication
Date de publication:
01 12 2022
01 12 2022
Historique:
received:
25
11
2020
revised:
06
04
2022
accepted:
16
04
2022
pubmed:
19
4
2022
medline:
6
12
2022
entrez:
18
4
2022
Statut:
ppublish
Résumé
Attention helps us to be aware of the external world, and this may be especially important when a threat stimulus predicts an aversive outcome. Electroencephalogram (EEG) alpha-band suppression has long been considered as a neural signature of attentional engagement. The present study was designed to test whether attentional engagement, as indexed by alpha-band suppression, is increased in a sustained manner following a conditioned stimulus (CS) that is paired with an aversive (CS+) vs neutral (CS-) outcome. We tested 70 healthy young adults in aversive conditioning and extinction paradigms. One of three colored circles served as the CS+, which was paired in 50% of the trials with a noise burst (unconditioned stimulus, US). The other colored circles (CS-) were never paired with the US. For conditioning, we found greater alpha-band suppression for the CS+ compared to the CS-; this suppression was sustained through the time of the predicted US. This effect was significantly reduced for extinction. These results indicate that conditioned threat stimuli trigger an increase in attentional engagement as subjects monitor the environment for the predicted aversive stimulus. Moreover, this alpha-band suppression effect may be valuable for future studies examining normal or pathological increases in attentional monitoring following threat stimuli.
Identifiants
pubmed: 35434733
pii: 6569531
doi: 10.1093/scan/nsac029
pmc: PMC9766959
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Research Support, N.I.H., Extramural
Langues
eng
Sous-ensembles de citation
IM
Pagination
1101-1117Subventions
Organisme : NIH HHS
ID : R01MH076226
Pays : United States
Organisme : NIH HHS
ID : R03MH098119
Pays : United States
Informations de copyright
© The Author(s) 2022. Published by Oxford University Press.
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