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This study proposes to use transcranial direct current stimulation (tDCS), a technique by which a very small electrical current (2 mA) is applied to the scalp, along side speech therapy in patients with subacute stroke and aphasia in order to enhance language recovery. Aphasic patients in an inpatient neurorehabilitation facility who have experienced a stroke between one week and three months prior to enrollment will be invited to participate. Participants will receive either real or sham tDCS to the left hemisphere of the brain for a minimum of 5 consecutive sessions to up-to a max of 10 sessions depending on the length of their rehab stay . Stimulation will be paired with with the patient's normal speech therapy schedule. Participant's language skills will be assessed at baseline and immediately after the last session of therapy in order to determine whether tDCS is associated with either transient or persistent improvement in language.
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Speech therapy is the standard of care nationwide in treating individuals who have had a stroke and are now experiencing aphasia. Speech therapy can help to rehabilitate language skills and supplement function by teaching alternate strategies for communication; however, these benefits often leave room for further improvement. Researchers have focused their efforts in combining speech therapy with other techniques to boost the effects. In this study, we will combine speech therapy with non-invasive brain stimulation, specifically transcranial direct current stimulation (tDCS), in the hopes of significantly improve language in subacute aphasia patients.
This is a double-blind, randomized, sham-controlled pilot project, where inpatients with subacute stroke and aphasia will be recruited from the Penn Institute for Rehabilitation Medicine hospital (PIRM). The typical patient admitted to PIRM is approximately 1-2 weeks post-stroke. Upon enrollment, baseline aphasia severity will be characterized using standardized measures such as the Western Aphasia Battery (WAB), Pyramids and Palm Trees (PPT) and Philadelphia Naming Test (PNT) by the patient's speech therapist. Subjects will subsequently be randomized to undergo either real or sham tDCS. Subjects will then undergo a minimum of 5-consectuive stimulation session (Monday-Friday) and maximum of 10-consecutive stimulation sessions (Monday-Friday) of either real or sham tDCS. During stimulation, subjects will receive either real tDCS at a current of 2.0 mA for 20 minutes or sham stimulation for an equivalent period of time with a 30sec ramp-up/ramp-down. Sham stimulation mimics real stimulation closely; most subjects cannot distinguish between real and sham tDCS. During stimulation visits subjects will concurrently participate in their regular speech therapy treatment. Speech Therapy will be administered by their speech therapist and will follow whatever protocol the therapist deems useful for standard of care treatment of their aphasia. An immediate follow-up session will also take place, subjects will repeat language batteries including the WAB, PPT and PNT.
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Data sourced from clinicaltrials.gov
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