Obesity, subliminal perception and inhibition: Neuromodulation of the prefrontal cortex.

Details

Serval ID
serval:BIB_995D07687B26
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Obesity, subliminal perception and inhibition: Neuromodulation of the prefrontal cortex.
Journal
Behaviour research and therapy
Author(s)
Osimo S.A., Korb S., Aiello M.
ISSN
1873-622X (Electronic)
ISSN-L
0005-7967
Publication state
Published
Issued date
08/2019
Peer-reviewed
Oui
Volume
119
Pages
103408
Language
english
Notes
Publication types: Journal Article
Publication Status: ppublish
Abstract
The prefrontal cortex (PFC) plays a central role in food choice, and may be partly dysfunctional in obesity - a condition linked to altered attention and inhibition processes, particularly in response to food-related stimuli. We investigated the role of the PFC in subliminal visual processing and response inhibition to food pictures using anodal, cathodal, or sham transcranial direct current stimulation (tDCS) in a sample of 53 normal weight, overweight, or obese participants. Subliminal processing was measured with a breaking continuous flash suppression task (bCFS), and inhibition with a Go/No-Go task. BMI was included in the analyses as a continuous predictor. Higher BMI was associated with prolonged subliminal processing for both food and nonfood pictures in the bCFS task, and with longer RTs in food Go trials in the Go/No-Go task. Therefore, higher BMI was associated with an attentional bias for food images during supraliminal, but not subliminal visual processing. Moreover, anodal tDCS resulted in shorter detection times in the bCFS task, especially in participants with higher BMI. We conclude that anodal tDCS affects subliminal perception and attentional processes, and speculate that these effects may explain previous reports of reduced craving and food intake after anodal tDCS.
Keywords
Adult, Attentional Bias/physiology, Awareness/physiology, Body Mass Index, Case-Control Studies, Female, Humans, Inhibition, Psychological, Male, Obesity/psychology, Overweight/psychology, Photic Stimulation, Prefrontal Cortex/physiology, Psychomotor Performance/physiology, Subliminal Stimulation, Transcranial Direct Current Stimulation, Visual Perception/physiology, Young Adult, Attentional bias, Continuous flash suppression (CFS), Food, Go/No-Go, Obesity, Transcranial direct current stimulation (tDCS)
Pubmed
Web of science
Create date
24/06/2019 7:39
Last modification date
09/07/2020 5:22
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