Greg Grindley will tell surgeons how he feels as they carefully thread electrodes deep into his brain this weekend, attempting to reverse symptoms of his Parkinson's, a disease that freezes his face and sets his hands trembling.

The 49-year-old Ohio electrician will be awake for the surgery, known as deep brain stimulation, and his reactions will help guide lead surgeon Jonathan Miller in placing the four electrodes. While Grindley answers questions from the medical team, doctors will answer questions from viewers watching the procedure on live television. (You can ask ask on Twitter at #brainsurgerylive.)

Miller, director of Functional and Restorative Neurosurgery at Ohio's University Hospitals Case Medical Center, where the surgery will happen, talked to us about about how deep brain