To PIEN Participants:- I came across a recent article on HPSTN which intrigued me . This new surgical treatment for PD is reported to be pioneered by a Dr. Alim Benabid in France and is now being studied somewhere in Canada. I searched the Parkinson's Archives for more information but came up blank. Does anyone have any other leads, more details, experiences ??? Cheers, Ken Clements <[log in to unmask]>