Neurosurgery - The Brain Doesn't Have Any Pain Sensors

The patient is not just awake, but is alert and talking through this because this is shocking to me. The brain doesn't have any pain sensors. And so you don't need to anesthetize the brain during brain surgery. It feels nothing. While these electrodes are in they're kind of probing around various different areas of the brain as she's awake. They're trying to figure out what makes her see red or hear Bach? What does this do? Does this make you stop being able to speak? These are the basic moments of human experience.