Neurology Our People Joint Appointments Joint Appointments Florin Despa, PhD Pharmacology and Nutritional SciencesSaha Cardiovascular Research Center Positions Held: Professor, Lewis Honors Faculty Justin Fraser, MD, FAANS, FAHA Neurosurgery Positions Held: Associate Professor of Cerebrovascular, Endovascular, and Skull Base Surgery (with tenure)Vice Chair, NeurosurgeryDirector of Cerebrovascular Surgery Greg Gerhardt, PhD Neuroscience Positions Held: Regular Faculty James Norton, PhD Psychiatry Positions Held: Professor Jeffrey P Okeson, DMD Positions Held: Professor of Dentistry Stephen W Scheff Positions Held: Regular Faculty John Villano, MD, PhD NeurosurgeryInternal Medicine Positions Held: ProfessorDirector, Clinical Neuro-Oncology Greg Wheeler, MD Neurosurgery Positions Held: Assistant Professor of NeurosurgeryChief, Division of Neurosurgery at the Lexington Veterans Affairs Medical Center