What’s going on in our brains? I’m focused on their sensitivity and what happens when they’re injured and are in need of vital repairs.

Dr. Robert Spetzler has been a pioneer in neurosurgery, performing on patients for decades at Phoenix’s Barrow Neurological Institute.

He recently decided he would retire from the position as Barrow’s president and CEO.

We stopped by Spetzler’s office to talk about what has changed in neurosurgery and how much we still don’t know about the human brain.