I use state of the art technology: microcsope (Zeiss Pentera), Ultrasonic aspirator, StealthStation image guided surgery system, CRW & ZD stereotactic frames, PathFinder Robotic System, KTP-laser, Fluorescence image guided techniques, Storz endoscopes, microelectrode recordings, facial monitoring, brain stem evoked potential monitoring, SSPs, and Intraoperative electro- corticography.