The Food and Drug Administration has approved deep-brain stimulation to treat Parkinson's and a movementdisorder known as dystonia, and it is used to treat chronic pain and severe depression.
In 2000, Harrell switched again--this time to AstraZeneca 's (nyse: AZN - news - people ) Seroquel on the recommendation of a movementdisorder clinic and a doctor who came to one of his jazz shows.