Transcranial direct current stimulation (tDCS) has shown the potential to improve symptoms in patients with Parkinson's disease, however its effects have not been consistent in randomized studies to date, limiting widespread adoption of this technology. A critical gap in our knowledge is a detailed understanding of how tDCS affects motor areas in the brain. We propose using tDCS while recording directly from motor cortex using subdural electrocorticography (sECoG) in Parkinson's patients undergoing deep brain stimulation surgery. We expect this novel approach to broaden our understanding of tDCS application in Parkinson's disease and possibly lead to therapeutic advances in this population.
Transcranial magnetic stimulation (TMS) is often used to assess the excitability of the brain and the connectivity between the brain and peripheral muscles. However, less work has been completed with the portion of the brain controlling leg muscles. In addition, there appears to be more error and less reliability in these measures in those with stroke. This project aims to assess a battery of TMS-derived outcome measures to determine the most effective for those after stroke. This information is of critical importance as we use this technology to assess changes after rehabilitation post stroke and to understand the motor control of walking after neurologic injury.
Rehabilitation interventions including resistance training, functional and task-specific therapy, and gait or locomotor training have been shown to be successful in improving motor function in individuals with neurologic disease or injury. Recent investigations conducted in our laboratory indicate that intense resistance training coupled with task-specific functional training lead to significant gains in functional motor recovery. Similarly, gait rehabilitation involving intense treadmill training and/or task-specific locomotor training has been shown to be effective in improving locomotor ability. However, the underlying neural adaptations associated with these therapeutic approaches are not well understood. Our primary goal is to understand the motor control underpinnings of neurologic rehabilitation in order to apply this knowledge to future generations of therapeutic interventions.