It's unpredictable, often disabling, and there doesn't seem to be a cure. It disrupts the flow of information between the brain and the body. That's one of the conditions that neurologist Norman McNulty examines on this revealing program.

It's unpredictable, often disabling, and there doesn't seem to be a cure. It disrupts the flow of information between the brain and the body. That's one of the conditions that neurologist Norman McNulty examines on this revealing program. Read Less