Pardon me for butting in, but I was concerned about Ken Becker's answer creating a misconception. The way Mr. Becker's letter was written, one might get the impression that collagen injection would be the first thing tried, then, if that failed, one might look into The Lee Silverman Voice Treatment method. As enthusiastic a correspondent as Mr. Becker is, he has no credentials. His father has Parkinsons, and that is why he stays on this listserv. I would beg to differ with him, and offer the following. I am a physician, I have PD, I am a Lee Silverman graduate. My opinion is that his recommendations are reversed. From a modest beginning, the LSVT has branched. In the last three years, the staff of the William Gould Center for treatment of the voice at the Denver Center of the Performing Arts have trained other speech therapists around the country and the LSVT is thus fairly widely available. By contrast, the collagen injection technique is practised by one doctor in the LA area, only, and must be repeated every 5 or 6 weeks with additional injections. I would be glad to assist you in finding a speech therapist in your area who has trained in the LSVT. Sincerely, Ellis A. Penny, M.D. [log in to unmask]