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Effects of transcranial direct current stimulation on episodic memory in older adults: A meta-analysis
Lijuan Huo1,2,3; Xinyi Zhu1,3; Zhiwei Zheng1,3; Jialing Ma4; Zhuoya Ma1,3; Wenjun Gui1,3; Juan Li1,3
First AuthorLijuan Huo, PhD
Correspondent Emaillijuan@psych.ac.cn
Contribution Rank1
Abstract

Objectives: In the last two decades, the number of intervention studies using transcranial direct current stimulation (tDCS) has grown enormously. Though some studies have shown positive influences on episodic memory among older adults, disagreement exists in the literature. Therefore, the current meta-analysis aimed to provide a quantitative assessment of the efficacy of tDCS in modulating episodic memory functions in older adults.
Method: Eligible studies were sham-controlled trials examining the effects of anodal tDCS on episodic memory in older adults. Twenty-four articles comprising 566 participants aged over 60 qualified for inclusion.
Results: Compared to the sham tDCS group, the active tDCS group showed significant memory improvements at both immediate poststimulation (Hedges’ g = 0.625, p = .001) and long-term follow-up (Hedges’ g = 0.404, p = .002). There were no differences in effect sizes between cognitively healthy and impaired older adults. Moderator analyses suggested that tDCS having a duration of 20 min or less, bilateral stimulation, or a larger stimulation area would produce greater benefits for episodic memory performance in older adults.
Discussion: These findings suggest that tDCS holds great promise to ameliorate memory decline in older individuals. In the future, well-designed randomized controlled trials are expected to verify the optimal stimulation protocols and determine the factors impacting the long-term effects of tDCS in enhancing episodic memory.

 

KeywordBrain stimulation Cognitive enhancement Intervention Neural plasticity Prefrontal cortex
2019
Source PublicationThe Journals of Gerontology, Series B: Psychological Sciences and Social Sciences
ISSN1758-5368
VolumeXXIssue:XXPages:1-11
Subtypearticle
Indexed BySCI ; SSCI ; SSCI
QuartileQ1
Document Type期刊论文
Identifierhttp://ir.psych.ac.cn/handle/311026/31910
Collection中国科学院心理研究所
健康与遗传心理学研究室
Corresponding AuthorJuan Li
Affiliation1.Center on Aging Psychology, CAS Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China.
2.The Affiliated Brain Hospital of Guangzhou Medical University, Guangzhou, China.
3.Department of Psychology, University of Chinese Academy of Sciences, Beijing, China.
4.School of Psychology, University of Aberdeen, UK.
First Author AffilicationInstitute of Psychology, Chinese Academy of Sciences
Corresponding Author AffilicationInstitute of Psychology, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Lijuan Huo,Xinyi Zhu,Zhiwei Zheng,et al. Effects of transcranial direct current stimulation on episodic memory in older adults: A meta-analysis[J]. The Journals of Gerontology, Series B: Psychological Sciences and Social Sciences,2019,XX(XX):1-11.
APA Lijuan Huo.,Xinyi Zhu.,Zhiwei Zheng.,Jialing Ma.,Zhuoya Ma.,...&Juan Li.(2019).Effects of transcranial direct current stimulation on episodic memory in older adults: A meta-analysis.The Journals of Gerontology, Series B: Psychological Sciences and Social Sciences,XX(XX),1-11.
MLA Lijuan Huo,et al."Effects of transcranial direct current stimulation on episodic memory in older adults: A meta-analysis".The Journals of Gerontology, Series B: Psychological Sciences and Social Sciences XX.XX(2019):1-11.
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