Transcranial direct current stimulation over right posterior parietal cortex changes prestimulus alpha oscillation in visual short-term memory task

NCUIR > college of Health Sciences and Technology > College of Science Institute of Cognitive Neuroscience > journal & Dissertation > Item 987654321/108401

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/108401

Title:	Transcranial direct current stimulation over right posterior parietal cortex changes prestimulus alpha oscillation in visual short-term memory task
Authors:	阮啓弘;Hsu, Tzu-Yu;Tseng, Philip;Liang, Wei-Kuang;Cheng, Shih-Kuen;Juan, Chi-Hung
Contributors:	生醫理工學院認知神經科學研究所
Keywords:	Adult;Alpha Rhythm - physiology;Attention - physiology;Brain;Electroencephalography;Female;Humans;Male;Memory, Short-Term - physiology;Parietal Lobe - physiology;Photic Stimulation;Studies;Transcranial Direct Current Stimulation;Visual Perception - physiology;Young Adult
Date:	2014-01-01
Issue Date:	2026-04-23 14:46:44 (UTC+8)
Publisher:	United States: Elsevier Inc
Abstract:	摘要： Alpha band activity changes accompanied with the level attentional state, and recent studies suggest that such oscillation is associated with activities in the posterior parietal cortex. Here we show that artificially elevating parietal activity via positively-charged electric current through the skull can rapidly and effortlessly change people's prestimulus alpha power and improve subsequent performance on a visual short-term memory (VSTM) task. This modulation of alpha power and behavioral performance, however, is dependent on people's natural VSTM capability such that only the low performers benefitted from the stimulation, whereas high performers did not. This behavioral dichotomy is accounted by prestimulus alpha powers around the parieto-occipital regions: low performers showed decreased prestimulus alpha power, suggesting improvement in attention deployment in the current paradigm, whereas the high performers did not benefit from tDCS as they showed equally-low prestimulus alpha power before and after the stimulation. Together, these results suggest that prestimulus alpha power, especially in low performers, can be modulated by anodal stimulation and alter subsequent VSTM performance/capacity. Thus, measuring alpha before stimulus onset may be as important as measuring other VSTM-related electrophysiological components such as attentional allocation and memory capacity related components (i.e. N2 posterior-contralateral, N2pc, or contralateral delay activity, CDA). In addition, low VSTM performers perhaps do not suffer not only from poor VSTM capacity, but also from broad attentional mechanisms, and prestimulus alpha may be an useful tool in understanding the nature of individual differences in VSTM. •Using transcranial direct current stimulation (tDCS) to investigate the prestimulus alpha oscillations in VSTM.•Anodal tDCS decreased prestimulus alpha power during the prestimulus period and increased the following VSTM performance on low VSTM performers.•The first demonstration that anodal stimulation can alter prestimulus alpha power in VSTM task.•Providing further understanding of the neural basis of alpha oscillation in attention and VSTM. 其他題名： Neuroimage 出版者： United States: Elsevier Inc 出版日期： 2014-09-01 出處： NeuroImage, 2014-09, Vol.98, p.306-313 版權： 2014 Elsevier Inc. 版權： Copyright © 2014 Elsevier Inc. All rights reserved. 版權： Copyright Elsevier Limited Sep 1, 2014 識別號： ISSN: 1053-8119 識別號： ISSN: 1095-9572 識別號： EISSN: 1095-9572 識別號： DOI: 10.1016/j.neuroimage.2014.04.069 識別號： PMID: 24807400
Appears in Collections:	[College of Science Institute of Cognitive Neuroscience] journal & Dissertation

Files in This Item:

File	Description	Size	Format
index.html		0Kb	HTML	14	View/Open

社群 sharing

Loading...