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822 active trials for Stroke

Perturbation Training for Fall-risk Reduction Among Stroke Survivors

The long-term objective of this research is to develop an efficacious training paradigm to enhance stroke survivors' defense mechanisms against falls and possibly reduce healthcare cost. The Centers for Disease Control and Prevention estimates the direct medical cost for fall related injuries to be $34 billion annually. Forty percent to 70% of community-dwelling stroke survivors experience detrimental falls each year and tend to have 1.5 to 4 times higher risk of hip fracture than their healthy counterparts; with only less than 40% of those individuals regaining independent mobility. Falls, thus not only affect activities of daily living but also reduce mobility, increase risk of second stroke and mortality. Despite potential financial and functional implications of falls in this population, health-care personnel are limited in their ability to develop and validate interventions to reduce fall-risk for them. Further emphasis is placed on locomotor training with focus on enhancing paretic limb function. The project design consists of a randomized controlled trial to examine the ability of chronic stroke survivors to acquire, generalize and retain adaptations to slip-perturbation training for not only mitigating fall risk but also improving walking function. It also explores translation of this paradigm to the sub-acute population. The paradigm is novel in that it targets contributions of the paretic vs. non-paretic limbs on fall-risk through a bilateral training paradigm that involves training the non-paretic side first and then paretic to facilitate acquisition of fall-prevention skills on the paretic side, which may otherwise take longer to acquire training effects. The longer-term benefits of such perturbation training, targeting both limbs for reducing falls will be assessed not only in the laboratory but also in real life via wearable sensors, along with improved community walking function. The hypothesis of this study if supported by the results will provide an evidence-supported training protocol to reduce the fall-risk not only in people living with hemiparetic stroke but also among survivors of other acquired unilateral cortical lesions.

Start: May 2017
Effect of Constraint-Induced Gaming Therapy in an Acute Care Setting

Current protocols for therapy on a rehabilitation unit call for intensive rehabilitation composed of high intensity, long duration therapy. Evidence from brain healing and animal research, along with motor learning principles suggest that a treatment program composed of short duration therapy sessions distributed throughout the day may provide better rehabilitation outcomes for stroke patients. Such a program can be implemented using constraint-induced therapy in which the Veteran is provided with opportunities to use the affected limb while participating in a video game and completing complementary tasks in therapy. Additionally, rehabilitation outcomes may improve if Veterans are provided with regular opportunities to participate in gaming therapy at home after discharge from the hospital rather than having to travel to a clinic or receive limited or no follow-up in rural areas. This project will develop a therapeutic model that promotes use of the impaired arm and hand. Researchers often call this type of therapy "constraint induced therapy". In this study, participants focus on using the impaired limb rather than the unaffected limb. A small group of patients will participate in a question and answer session about preferences for activities which make up transfer tasks. Up to twenty-four (24) Veterans inpatient with hemiparesis due to stroke in the brain will be recruited from the Minneapolis VA Health Care System. Study participants will only be able to play the game using the impaired limb. Participants may also receive automated reminders to use the impaired arm throughout the day. Gaming will occur in patient room and during occupational therapy. Participants will have the option of being discharged with the gaming system for continued gameplay. Outcome measures will include motor function tests that evaluate upper extremity function.

Start: September 2019
Repetitive Transcranial Magnetic Stimulation and Multi-modality Aphasia Therapy for Post-stroke Non-fluent Aphasia

Many stroke survivors experience aphasia, a loss or impairment of language affecting the production or understanding of speech. One common type of aphasia is known as non-fluent aphasia. Patients with non-fluent aphasia have difficulty formulating grammatical sentences, often producing short word fragments despite having a good understanding of what others are trying to communicate to them. Speech language pathologists (SLPs) play a central role rehabilitating persons with aphasia and administer therapy in an attempt to improve communication skills. Despite standard therapy, approximately 50% of individuals who experience aphasia acutely continue to have language deficits more than 6 months post-stroke. In most people, Broca's area is dominant in the left side of the brain. Following a left-sided stroke, the right-sided homologue of Broca's area (the pars triangularis), may adopt language function. Unfortunately, reorganizing language to the right side of the brain seems to be less effective than restoring function to the left hemisphere. Repetitive transcranial magnetic stimulation (rTMS), a form of non-invasive brain stimulation, can be used to suppress activity of specific regions in the right side of the brain to promote recovery of function in the perilesional area. Despite preliminary success in existing studies using rTMS in post-stroke aphasia, there is much work to be done to better understand the mechanisms underlying recovery. Responses to rTMS have been positive, yet heterogenous, which may be related to timing of treatments following stroke.

Start: April 2021