It is no rumor nor is the procedure new. The precise 3-D location of tissue in the brain for operations was started in 1906 by Drs. Robert H Clarke and Victor Hoealey at the University College in London. The Procedure became known as stereotactic surgery. Undoubtably, the procedure is even more precise today, but the principle is still the same. For more information see "Parkinson's Disease; The Mystery, The Search and The Promise" Chapter 5 - Early Surgery, pages 42 - 54. ISBN #0-9620354-1-6 LCC#92-0939123 Cheers to you, VernD