DBS for Cognitive Deficits After Traumatic Brain Injury

Patients will arrive on the morning of surgery to the medical imaging department of the Sunnybrook Hospital. They will have a stereotactic frame attached directly to their skull, after infiltration with local anesthesia. The frame allows precise coordinates to be acquired so that deep brain structures can be targeted with implanted electrodes. The patient will then undergo a CT scan with the frame in place, followed by transport directly to the operating room. The anesthesia team will insert an intravenous line and may use gentle sedation to relax the patient prior to and during the operation, as they will remain awake during the first stage of the operation. In the operating room the patient's head, via the frame, will be attached to the operating room table, and their scalp infiltrated with additional local anesthetic. A skin incision will be made and two burr holeswith approximately 1.4cm in diameter drilled through the skull. A small electrode will identify the optimal spot for ele