An Exploratory Study of Cerebellar Transcranial Direct Current Stimulation in Individuals With Chronic Stroke Aphasia.

MedStar author(s):
Citation: Cognitive & Behavioral Neurology. 34(2):96-106, 2021 Jun 02.PMID: 34074864Institution: MedStar National Rehabilitation NetworkForm of publication: Journal ArticleMedline article type(s): Journal ArticleSubject headings: IN PROCESS -- NOT YET INDEXEDYear: 2021Local holdings: Available online through MWHC library: March 2003 - presentISSN:
  • 1543-3633
Name of journal: Cognitive and behavioral neurology : official journal of the Society for Behavioral and Cognitive NeurologyAbstract: BACKGROUND: Aphasia is a common, debilitating consequence of stroke, and speech therapy is often inadequate to achieve a satisfactory outcome. Neuromodulation techniques have emerged as a potential augmentative treatment for improving aphasia outcomes. Most studies have targeted the cerebrum, but there are theoretical and practical reasons that stimulation over the cerebral hemispheres might not be ideal. On the other hand, the right cerebellum is functionally and anatomically linked to major language areas in the left hemisphere, making it a promising alternative target site for stimulation.CONCLUSION: These results may provide guidance for investigators who are planning larger trials of tDCS for individuals with chronic poststroke aphasia. Copyright (c) 2021 Wolters Kluwer Health, Inc. All rights reserved.METHOD: Ten individuals received five sessions of open-label anodal tDCS targeting the right cerebellum. The effects of the tDCS were compared with the effects of sham tDCS on 14 controls from a previous clinical trial. In total, 24 individuals with chronic poststroke aphasia participated in the study. Behavioral testing was conducted before treatment, immediately following treatment, and at the 3-month follow-up.OBJECTIVE: To provide preliminary effect sizes for the ability of a short course of anodal transcranial direct current stimulation (tDCS) targeted over the right cerebellum to enhance language processing in individuals with chronic poststroke aphasia.RESULTS: Cerebellar tDCS did not significantly enhance language processing measured either immediately following treatment or at the 3-month follow-up. The effect sizes of tDCS over sham treatment were generally nil or small, except for the mean length of utterance on the picture description task, for which medium to large effects were observed.All authors: DeMarco AT, Dvorak E, Lacey E, Stoodley CJ, Turkeltaub PEFiscal year: FY2021Digital Object Identifier: Date added to catalog: 2021-06-28
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Journal Article MedStar Authors Catalog Article 34074864 Available 34074864

Available online through MWHC library: March 2003 - present

BACKGROUND: Aphasia is a common, debilitating consequence of stroke, and speech therapy is often inadequate to achieve a satisfactory outcome. Neuromodulation techniques have emerged as a potential augmentative treatment for improving aphasia outcomes. Most studies have targeted the cerebrum, but there are theoretical and practical reasons that stimulation over the cerebral hemispheres might not be ideal. On the other hand, the right cerebellum is functionally and anatomically linked to major language areas in the left hemisphere, making it a promising alternative target site for stimulation.

CONCLUSION: These results may provide guidance for investigators who are planning larger trials of tDCS for individuals with chronic poststroke aphasia. Copyright (c) 2021 Wolters Kluwer Health, Inc. All rights reserved.

METHOD: Ten individuals received five sessions of open-label anodal tDCS targeting the right cerebellum. The effects of the tDCS were compared with the effects of sham tDCS on 14 controls from a previous clinical trial. In total, 24 individuals with chronic poststroke aphasia participated in the study. Behavioral testing was conducted before treatment, immediately following treatment, and at the 3-month follow-up.

OBJECTIVE: To provide preliminary effect sizes for the ability of a short course of anodal transcranial direct current stimulation (tDCS) targeted over the right cerebellum to enhance language processing in individuals with chronic poststroke aphasia.

RESULTS: Cerebellar tDCS did not significantly enhance language processing measured either immediately following treatment or at the 3-month follow-up. The effect sizes of tDCS over sham treatment were generally nil or small, except for the mean length of utterance on the picture description task, for which medium to large effects were observed.

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