Low Intensity Focused Ultrasound Stimulation in Stroke Patients - Parameter Optimization
Duke University
Summary
The goal of this research study is to optimize the parameter of Low-Intensity Focused Ultrasound Stimulation (LIFUS) that is most effective in changing cortical excitability and motor learning skills in patients who suffered a stroke. The researchers hope to answer two questions. * with increasing power, would LIFUS be more effective? * with the same power, what LIFUS timing is the best For Aim 1, the study will compare 8, 4 W/cm\^2 to a zero(sham) stimulation to see if higher power is the better. For Aim 2, the study will compare 500 vs 1000 vs 2000 Hz "timing" to see which one is better.
Eligibility
- Age range
- 21+ years
- Sex
- All
- Healthy volunteers
- No
Inclusion Criteria: * age \>=21 years old of any gender or race * First-ever ischemic or hemorrhagic stroke (neuroimaging verified) at least 6 months from the stroke onset of symptoms * Unilateral arm weakness measured by the Fugl-Meyer Upper-Extremity Scale ≤ 62/64 * Inducible rest motor threshold and testing motor threshold recorded from the affected abductor pollicis brevis muscle Exclusion Criteria: * Bilateral strokes (infarcts and/or hematoma) * Other co-existent neuromuscular disorders affecting upper extremity motor impairment * History of medically uncontrolled depression or other…
Interventions
- DeviceLow intensity focused ultrasound stimulation
A low-intensity focused ultrasound stimulation
Location
- Duke University HospitalDurham, North Carolina