Each site is anesthetized. The frame is necessary to achieve the millimeter accuracy we require to perform pallidotomy safely. An MRI is then obtained with the frame and the images are transferred to our computer planning system. The operation is planned on the computer and the initial coordinates for the target are selected. The scalp is then shaved where the operation is to be performed, and the operation is begun.
Every effort is made to make the patient as comfortable as possible.
This includes placement of an air pillow behind the neck, pillows below the knees, and a nurse who will massage any cramps the patient experiences. For those who urinate frequently, a catheter is placed in the bladder to drain urine during the operation. It is promptly removed after surgery. The microelectrode is then inserted into the brain. Each recording session takes 20-30 minutes to complete.