 In this study, investigators will show proof-of-concept that brain signals can be used in real-time, closed-loop mode to trigger stimulation for hand function. Subjects will undergo surgery to implant a unilateral subdural strip electrode Resume II, Model 3587A over the motor cortex. These electrodes implanted in the brain will enable bioelectrical data recording sensing from the brain to the implanted Activa PCS. The cortical sensing data will be 