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Electronic Cigarette Vaping Did Not Enhance the Neural Process of Working Memory for Regular Cigarette Smokers

Authors
Kim, Dong-YoulJang, YujinHeo, Da-WoonJo, SungmanKim, Hyun-ChulLee, Jong-Hwan
Issue Date
18-2월-2022
Publisher
FRONTIERS MEDIA SA
Keywords
abstinence; electronic cigarette; tobacco cigarettes; functional magnetic resonance imaging; satiety; working memory
Citation
FRONTIERS IN HUMAN NEUROSCIENCE, v.16
Indexed
SCIE
SCOPUS
Journal Title
FRONTIERS IN HUMAN NEUROSCIENCE
Volume
16
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/139371
DOI
10.3389/fnhum.2022.817538
ISSN
1662-5161
Abstract
BackgroundElectronic cigarettes (e-cigs) as substitute devices for regular tobacco cigarettes (r-cigs) have been increasing in recent times. We investigated neuronal substrates of vaping e-cigs and smoking r-cigs from r-cig smokers. MethodsTwenty-two r-cig smokers made two visits following overnight smoking cessation. Functional magnetic resonance imaging (fMRI) data were acquired while participants watched smoking images. Participants were then allowed to smoke either an e-cig or r-cig until satiated and fMRI data were acquired. Their craving levels and performance on the Montreal Imaging Stress Task and a 3-back alphabet/digit recognition task were obtained and analyzed using two-way repeated-measures analysis of variance. Regions-of-interest (ROIs) were identified by comparing the abstained and satiated conditions. Neuronal activation within ROIs was regressed on the craving and behavioral data separately. ResultsCraving was more substantially reduced by smoking r-cigs than by vaping e-cigs. The response time (RT) for the 3-back task was significantly shorter following smoking r-cigs than following vaping e-cigs (interaction: F (1, 17) = 5.3, p = 0.035). Neuronal activations of the right vermis (r = 0.43, p = 0.037, CI = [-0.05, 0.74]), right caudate (r = 0.51, p = 0.015, CI = [0.05, 0.79]), and right superior frontal gyrus (r = -0.70, p = 0.001, CI = [-0.88, -0.34]) were significantly correlated with the RT for the 3-back task only for smoking r-cigs. ConclusionOur findings suggest that insufficient satiety from vaping e-cigs for r-cigs smokers may be insignificant effect on working memory function.
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