Joe, Before I sought medical help for my PD, I noticed the tremor of a neighbor who has PD, and I compared the frequency of my internal pulsation with the frequency of my neighbor's tremor. They were the same as best as I could tell. That is how I just 'knew' I had something like PD. Baldwin [log in to unmask] ---------- From: J. R. Bruman Sent: Tuesday, September 16, 1997 1:45 PM To: Multiple recipients of list PARKINSN Subject: Re: Internal Shakiness As a latecomer to this discussion, may I point out, if the "internal" shakiness has EXACTLY the same frequency as the external tremor of PD (about 10 HZ) it's an unmistakable clue for your neuro, as that's the frequency of the muscle-brain feedback loop in PD. Cheers, Joe