Odor-evoked hedonic contexts influence the discrimination of facial expressions in the human brain.
EEG
Facial expression of emotion
Fast periodic visual stimulation
Multisensory integration
Valenced odor
Journal
Biological psychology
ISSN: 1873-6246
Titre abrégé: Biol Psychol
Pays: Netherlands
ID NLM: 0375566
Informations de publication
Date de publication:
01 2021
01 2021
Historique:
received:
21
04
2020
revised:
30
11
2020
accepted:
01
12
2020
pubmed:
9
12
2020
medline:
28
4
2021
entrez:
8
12
2020
Statut:
ppublish
Résumé
The influence of odor valence on expressive-face perception remains unclear. Here, three "valenced" odor contexts (pleasant, unpleasant, control) were diffused while scalp electroencephalogram (EEG) was recorded in 18 participants presented with expressive faces alternating at a 6-Hz rate. One facial expression (happiness, disgust or neutrality) repeatedly arose every 6 face pictures to isolate its discrimination from other expressions at 1 Hz and harmonics in the EEG spectrum. The amplitude of the brain response to neutrality was larger in the pleasant vs. control odor context, and fewer electrodes responded in the unpleasant odor context. The number of responding electrodes was reduced for disgust in both odor contexts. The response to happiness was unchanged between odor conditions. Overall, these observations suggest that valenced odors influence the neural discrimination of facial expressions depending on both face and odor hedonic valence, especially for the emotionally ambiguous neutral expression.
Identifiants
pubmed: 33290848
pii: S0301-0511(20)30165-4
doi: 10.1016/j.biopsycho.2020.108005
pii:
doi:
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
108005Informations de copyright
Copyright © 2020. Published by Elsevier B.V.