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Stockbridge MD, Elm J, Teklehaimanot AA, Cassarly C, Spell LA, Fridriksson J, Hillis AE. Individual Differences in Response to Transcranial Direct Current Stimulation With Language Therapy in Subacute Stroke. Neurorehabil Neural Repair 2023; 37:519-529. [PMID: 37592860 PMCID: PMC10528733 DOI: 10.1177/15459683231190642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/19/2023]
Abstract
BACKGROUND Transcranial direct current stimulation (tDCS) can be used to improve post-stroke aphasia. However, given the mixed evidence for its efficacy, individual differences may moderate the relative benefit of this strategy. In planned exploratory subgroup analyses, we examined whether age, education, sex, brain-derived neurotrophic factor status, and baseline performance individually impacted improvement in picture naming between baseline and 1 week after the end of the therapy, then whether the combination of factors that predicted recovery of naming and discourse differed for those who received concurrent tDCS. OBJECTIVE Examine whether individual differences influenced the effect of tDCS on language recovery. METHODS In this randomized, double-blind, sham-controlled, efficacy study of tDCS combined with language therapy for subacute post-stroke aphasia, patients completed an evaluation including the Philadelphia Naming Test and Cookie Theft picture description, which was analyzed for Content Units (CU) and Syllables/CU. Individual factors were examined using linear models including the interaction between treatment group and subgroup. RESULTS Significant interactions were observed between tDCS group and both age and education. The predictors of a positive response to tDCS differed from the predictors of a positive response to language treatment alone. While baseline performance was an important predictor of future performance regardless of treatment group, responses to treatment without tDCS were influenced by age whereas responses to treatment with tDCS were not. CONCLUSIONS Age and education influence the efficacy of different treatment strategies. Refinement of treatment selection is important to the overall individualization and optimization of post-stroke patient care. TRIAL REGISTRATION ClinicalTrials.gov NCT02674490.
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Affiliation(s)
- Melissa D. Stockbridge
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
| | - Jordan Elm
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC
| | - Abeba A. Teklehaimanot
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC
| | - Christy Cassarly
- Department of Public Health Sciences, Medical University of South Carolina, Charleston, SC
| | - Leigh-Ann Spell
- Department of Communication Sciences and Disorders, University of South Carolina
| | - Julius Fridriksson
- Department of Communication Sciences and Disorders, University of South Carolina
| | - Argye E. Hillis
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287
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Stockbridge MD, Elm J, Breining BL, Tippett DC, Sebastian R, Cassarly C, Teklehaimanot A, Spell LA, Sheppard SM, Vitti E, Ruch K, Goldberg EB, Kelly C, Keator LM, Fridriksson J, Hillis AE. Transcranial Direct-Current Stimulation in Subacute Aphasia: A Randomized Controlled Trial. Stroke 2023; 54:912-920. [PMID: 36912144 PMCID: PMC10050116 DOI: 10.1161/strokeaha.122.041557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 02/10/2023] [Indexed: 03/14/2023]
Abstract
BACKGROUND Transcranial direct-current stimulation (tDCS) is a promising adjunct to therapy for chronic aphasia. METHODS This single-center, randomized, double-blind, sham-controlled efficacy trial tested the hypothesis that anodal tDCS augments language therapy in subacute aphasia. Secondarily, we compared the effect of tDCS on discourse measures and quality of life and compared the effects on naming to previous findings in chronic stroke. Right-handed English speakers with aphasia <3 months after left hemisphere ischemic stroke were included, unless they had prior neurological or psychiatric disease or injury or were taking certain medications (34 excluded; final sample, 58). Participants were randomized 1:1, controlling for age, aphasia type, and severity, to receive 20 minutes of tDCS (1 mA) or sham-tDCS in addition to fifteen 45-minute sessions of naming treatment (plus standard care). The primary outcome variable was change in naming accuracy of untrained pictures pretreatment to 1-week posttreatment. RESULTS Baseline characteristics were similar between the tDCS (N=30) and sham (N=28) groups: patients were 65 years old, 53% male, and 2 months from stroke onset on average. In intent-to-treat analysis, the adjusted mean change from baseline to 1-week posttreatment in picture naming was 22.3 (95% CI, 13.5-31.2) for tDCS and 18.5 (9.6-27.4) for sham and was not significantly different. Content and efficiency of picture description improved more with tDCS than sham. Groups did not differ in quality of life improvement. No patients were withdrawn due to adverse events. CONCLUSIONS tDCS did not improve recovery of picture naming but did improve recovery of discourse. Discourse skills are critical to participation. Future research should examine tDCS in a larger sample with richer functional outcomes. REGISTRATION URL: https://www. CLINICALTRIALS gov; Unique identifier: NCT02674490.
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Affiliation(s)
- Melissa D. Stockbridge
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Jordan Elm
- Department of Public Health Science, Medical University of South Carolina, Charleston, SC 29425, United States
| | - Bonnie L. Breining
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Donna C. Tippett
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Rajani Sebastian
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Christy Cassarly
- Department of Public Health Science, Medical University of South Carolina, Charleston, SC 29425, United States
| | - Abeba Teklehaimanot
- Department of Public Health Science, Medical University of South Carolina, Charleston, SC 29425, United States
| | - Leigh Ann Spell
- Department of Communication Sciences and Disorders, University of South Carolina, Columbia, SC 29208, United States
| | - Shannon M. Sheppard
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
- Department of Communication Sciences & Disorders, Chapman University, Orange, CA 92866, United States
| | - Emilia Vitti
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Kristina Ruch
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Emily B. Goldberg
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Catherine Kelly
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
| | - Lynsey M. Keator
- Department of Communication Sciences and Disorders, University of South Carolina, Columbia, SC 29208, United States
| | - Julius Fridriksson
- Department of Communication Sciences and Disorders, University of South Carolina, Columbia, SC 29208, United States
| | - Argye E. Hillis
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21287, United States
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Bertocci MA, Chase HW, Graur S, Stiffler R, Edmiston EK, Coffman BA, Greenberg BD, Phillips ML. The impact of targeted cathodal transcranial direct current stimulation on reward circuitry and affect in Bipolar Disorder. Mol Psychiatry 2021; 26:4137-4145. [PMID: 31664174 PMCID: PMC7188575 DOI: 10.1038/s41380-019-0567-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Revised: 09/24/2019] [Accepted: 10/17/2019] [Indexed: 02/07/2023]
Abstract
Bipolar Disorder is costly and debilitating, and many treatments have side effects. Transcranial Direct Current Stimulation (tDCS) is a well-tolerated neuromodulation technique that may be a useful treatment for Bipolar Disorder if targeted to neural regions implicated in the disorder. One potential region is the left ventrolateral prefrontal cortex (vlPFC), which shows abnormally elevated activity during reward expectancy in individuals with Bipolar Disorder. We used a counterbalanced repeated measures design to assess the impact of cathodal (inhibitory) tDCS over the left vlPFC on reward circuitry activity, functional connectivity, and affect in adults with Bipolar Disorder, as a step toward developing novel interventions for individuals with the disorder. -1mA cathodal tDCS was administered over the left vlPFC versus a control region, left somatosensory cortex, concurrently with neuroimaging. Affect was assessed pre and post scan in remitted Bipolar Disorder (n = 27) and age/gender-matched healthy (n = 31) adults. Relative to cathodal tDCS over the left somatosensory cortex, cathodal tDCS over the left vlPFC lowered reward expectancy-related left ventral striatal activity (F(1,51) = 9.61, p = 0.003), and was associated with lower negative affect post scan, controlling for pre-scan negative affect, (F(1,49) = 5.57, p = 0.02) in all participants. Acute cathodal tDCS over the left vlPFC relative to the left somatosensory cortex reduces reward expectancy-related activity and negative affect post tDCS. Build on these findings, future studies can determine whether chronic cathodal tDCS over the left vlPFC has sustained effects on mood in individuals with Bipolar Disorder, to guide new treatment developments for the disorder.
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Affiliation(s)
- MA Bertocci
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - HW Chase
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - S Graur
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - R Stiffler
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - EK Edmiston
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - BA Coffman
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - BD Greenberg
- Department of Psychiatry, Brown University, Butler Hospital and Providence VA Medical Center, Providence, RI, USA
| | - ML Phillips
- Department of Psychiatry, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
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Keator LM, Basilakos A, Rorden C, Elm J, Bonilha L, Fridriksson J. Clinical Implementation of Transcranial Direct Current Stimulation in Aphasia: A Survey of Speech-Language Pathologists. AMERICAN JOURNAL OF SPEECH-LANGUAGE PATHOLOGY 2020; 29:1376-1388. [PMID: 32437243 PMCID: PMC7893518 DOI: 10.1044/2020_ajslp-19-00037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2019] [Revised: 10/23/2019] [Accepted: 01/26/2020] [Indexed: 06/11/2023]
Abstract
Purpose The objectives of this study are to (a) identify speech-language pathologists' (SLPs') familiarity with transcranial direct current stimulation (tDCS), (b) quantify what SLPs consider necessary tDCS-related improvement in aphasia severity (i.e., tDCS enhancement; desired improvement above and beyond traditional behavioral therapy) to implement this adjuvant therapy for the clinical management of aphasia, and (c) identify concerns that could potentially hinder the clinical adoption of tDCS. Method A brief (14-question) survey was disseminated via e-mail and social media outlets targeting SLPs working with individuals with aphasia. Results Two hundred twenty-one individuals responded, and 155 valid surveys were analyzed. Seventy-one percent of participants reported familiarity with tDCS prior to taking the survey. Clinicians reported a desired mean enhancement of 22.9% additional points on the Western Aphasia Battery-Revised Aphasia Quotient. Importantly, 94.2% of SLPs reported concerns regarding the implementation of tDCS in clinical settings (i.e., safety, cost, administrative approval, reimbursement and training). Conclusions This is the first study to identify SLPs' perspectives regarding the clinical adoption of tDCS. Results suggest the majority of queried SLPs were familiar with tDCS prior to taking the survey. Although SLPs report a desired improvement of approximately 23% additional points on the Western Aphasia Battery-Revised Aphasia Quotient to consider adopting tDCS into practice, many SLPs reported concerns regarding clinical adoption. Responses from the current survey offer important preliminary evidence to begin bridging the research-to-practice gap as it relates to the clinical implementation of tDCS. Relatedly, these results will inform future clinical trials.
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Affiliation(s)
- Lynsey M. Keator
- Department of Communication Sciences and Disorders, University of South Carolina, Columbia
| | - Alexandra Basilakos
- Department of Communication Sciences and Disorders, University of South Carolina, Columbia
| | - Christopher Rorden
- McCausland Center For Brain Imaging, University of South Carolina, Columbia
- Department of Psychology, University of South Carolina, Columbia
| | - Jordan Elm
- Department of Public Health Sciences, Medical University of South Carolina, Charleston
| | - Leonardo Bonilha
- Department of Neurology, Medical University of South Carolina, Charleston
| | - Julius Fridriksson
- Department of Communication Sciences and Disorders, University of South Carolina, Columbia
- McCausland Center For Brain Imaging, University of South Carolina, Columbia
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Sebastian R, Tsapkini K, Tippett DC. Transcranial direct current stimulation in post stroke aphasia and primary progressive aphasia: Current knowledge and future clinical applications. NeuroRehabilitation 2017; 39:141-52. [PMID: 27314871 DOI: 10.3233/nre-161346] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
BACKGROUND The application of transcranial direct current stimulation (tDCS) in chronic post stroke aphasia is documented in a substantial literature, and there is some new evidence that tDCS can augment favorable language outcomes in primary progressive aphasia. Anodal tDCS is most often applied to the left hemisphere language areas to increase cortical excitability (increase the threshold of activation) and cathodal tDCS is most often applied to the right hemisphere homotopic areas to inhibit over activation in contralesional right homologues of language areas. Outcomes usually are based on neuropsychological and language test performance, following a medical model which emphasizes impairment of function, rather than a model which emphasizes functional communication. OBJECTIVE In this paper, we review current literature of tDCS as it is being used as a research tool, and discuss future implementation of tDCS as an adjuvant treatment to behavioral speech-language pathology intervention. METHODS We review literature describing non-invasive brain stimulation, the mechanism of tDCS, and studies of tDCS in aphasia and neurodegenerative disorders. We discuss future clinical applications. RESULTS/CONCLUSIONS tDCS is a promising adjunct to traditional speech-language pathology intervention to address speech-language deficits after stroke and in the neurodegenerative disease, primary progressive aphasia. Limited data are available regarding how performance on these types of specific tasks translates to functional communication outcomes.
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Affiliation(s)
- Rajani Sebastian
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Kyrana Tsapkini
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Donna C Tippett
- Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Physical Medicine & Rehabilitation, Johns Hopkins University School of Medicine, Baltimore, MD, USA.,Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
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Abstract
The sequelae of post-stroke aphasia are considerable, with implications at the societal and personal levels. An understanding of the mechanisms of recovery of cognitive and language processes after stroke and the factors associated with increased risk of post-stroke language and cognitive deficits is vital in providing optimal care of individuals with aphasia and in counseling to their families and caregivers. Advances in neuroimaging facilitate the identification of dysfunctional or damaged brain tissue responsible for these cognitive/language deficits and contribute insights regarding the functional neuroanatomy of language. Evidence-based person-centered behavioral therapy remains the mainstay for rehabilitation of aphasia, although emerging evidence shows that neuromodulation is a promising adjunct to traditional therapy. These topics are discussed in this review, illustrating with recent studies from the Stroke Cognitive Outcomes and REcovery (SCORE) lab.
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Affiliation(s)
- Donna C. Tippett
- Department of Neurology, Department of Physical Medicine and Rehabilitation, and Department of Otolaryngology—Head and Neck Surgery Johns Hopkins University School of Medicine6th Floor, Johns Hopkins Outpatient Center, 601 North Caroline StreetBaltimoreMD21287-0910USA
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