Sue- I chose Pallidal Stimulation because of the reversibility of the procedure. If a new procedure comes up in the future I wanted my brain intact so it could be performed. In a regular Pallidotomy a scar is left on the brain that can't be removed. This could affect the results of a newer surgery. My preop symptons consisted of a strong tremor , severe dystonia in my feet , some dyskinesa and sinement was becoming not as effective as it had been. Following the operation I lost most of the tremor and dystonia. Also the sinement has become effective again. My most disturbing sympton was the tremor. I have control of it about 90% of the time. A highly stressful situation sets it off. It is as if the brain overides the signal. I hope his information is helpful. Dick