YEARS

2012-2017

AUTHORS

Julius Fridriksson

TITLE

Trans-cranial Direct Current Stimulation to Treat Aphasia: Phase II Trial

ABSTRACT

DESCRIPTION (provided by applicant): Stroke is the leading cause of adult disability in the United States. One of the most devastating impairments resulting from stroke is aphasia, a language impairment caused by left hemisphere damage involving cortical language areas. Although considerable research effort has focused on increasing aphasia treatment efficacy, most chronic stroke patients with aphasia experience limited recovery. Therefore, enhanced aphasia treatment outcome is of paramount interest as it may improve patients' communication ability and quality of life. Recent studies utilizing animal models suggest that low current transcranial direct current stimulation (tDCS) can locally increase the secretion of brain derived neurotrophic factor (BDNF), a protein that is crucial for induction of brain plasticity. Research i humans has further demonstrated the positive effect of anodal tDCS (A-tDCS) on learning in normal subjects. For the first time, we have shown in a pair of studies how A-tDCS can significantly enhance the effect of the behavioral treatment of anomia (impaired ability to name common objects) in patients with chronic stroke-induced aphasia. Capitalizing on these findings as well as our other research aimed at understanding brain plasticity associated with aphasia treatment, we propose to conduct a Phase II clinical trial to examine the effect of A-tDCS on anomia treatment outcome in patients with chronic stroke. This project will include a randomized, prospective, double-blind trial with two arms (active vs. control) wherein chronically stable stroke patients will receive behavioral aphasia treatment coupled with either A-tDCS or sham tDCS (S-tDCS). Because anomia is the hallmark impairment in aphasia and is present in all aphasic patients, regardless of severity or aphasia type, the primary outcome factor will be anomia severity, defined as the ability to correctly name common objects. The long-term goal of this research is to conduct a Phase III trial to determine if A-tDCS significantly enhances the effect of behavioral aphasia treatment. If the A-tDCS is proven to have a positive effect on aphasia treatment outcome, it is possible that patients who currently receive limited or no treatment benefit may respond to treatment when it is coupled with A-tDCS. Similarly, it is possible that A-tDCS may further boost the treatment effect for patients who respond positively to treatment in the absence of direct brain stimulation.

FUNDED PUBLICATIONS

  • Mapping remote subcortical ramifications of injury after ischemic strokes.
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    19 TRIPLES      17 PREDICATES      20 URIs      9 LITERALS

    Subject Predicate Object
    1 grants:3bee29df8fe18f049cae567fc7ff96a1 sg:abstract DESCRIPTION (provided by applicant): Stroke is the leading cause of adult disability in the United States. One of the most devastating impairments resulting from stroke is aphasia, a language impairment caused by left hemisphere damage involving cortical language areas. Although considerable research effort has focused on increasing aphasia treatment efficacy, most chronic stroke patients with aphasia experience limited recovery. Therefore, enhanced aphasia treatment outcome is of paramount interest as it may improve patients' communication ability and quality of life. Recent studies utilizing animal models suggest that low current transcranial direct current stimulation (tDCS) can locally increase the secretion of brain derived neurotrophic factor (BDNF), a protein that is crucial for induction of brain plasticity. Research i humans has further demonstrated the positive effect of anodal tDCS (A-tDCS) on learning in normal subjects. For the first time, we have shown in a pair of studies how A-tDCS can significantly enhance the effect of the behavioral treatment of anomia (impaired ability to name common objects) in patients with chronic stroke-induced aphasia. Capitalizing on these findings as well as our other research aimed at understanding brain plasticity associated with aphasia treatment, we propose to conduct a Phase II clinical trial to examine the effect of A-tDCS on anomia treatment outcome in patients with chronic stroke. This project will include a randomized, prospective, double-blind trial with two arms (active vs. control) wherein chronically stable stroke patients will receive behavioral aphasia treatment coupled with either A-tDCS or sham tDCS (S-tDCS). Because anomia is the hallmark impairment in aphasia and is present in all aphasic patients, regardless of severity or aphasia type, the primary outcome factor will be anomia severity, defined as the ability to correctly name common objects. The long-term goal of this research is to conduct a Phase III trial to determine if A-tDCS significantly enhances the effect of behavioral aphasia treatment. If the A-tDCS is proven to have a positive effect on aphasia treatment outcome, it is possible that patients who currently receive limited or no treatment benefit may respond to treatment when it is coupled with A-tDCS. Similarly, it is possible that A-tDCS may further boost the treatment effect for patients who respond positively to treatment in the absence of direct brain stimulation.
    2 sg:endYear 2017
    3 sg:fundingAmount 4444131.0
    4 sg:fundingCurrency USD
    5 sg:hasContribution contributions:866bc058af351bbaf0fdace2733a010b
    6 sg:hasFieldOfResearchCode anzsrc-for:11
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    8 anzsrc-for:1109
    9 sg:hasFundedPublication articles:60432c1d06a7d8e5a0179fbb610ac40c
    10 sg:hasFundingOrganization grid-institutes:grid.214431.1
    11 sg:hasRecipientOrganization grid-institutes:grid.254567.7
    12 sg:language English
    13 sg:license http://scigraph.springernature.com/explorer/license/
    14 sg:scigraphId 3bee29df8fe18f049cae567fc7ff96a1
    15 sg:startYear 2012
    16 sg:title Trans-cranial Direct Current Stimulation to Treat Aphasia: Phase II Trial
    17 sg:webpage http://projectreporter.nih.gov/project_info_description.cfm?aid=9033892
    18 rdf:type sg:Grant
    19 rdfs:label Grant: Trans-cranial Direct Current Stimulation to Treat Aphasia: Phase II Trial
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