Examine the validity and reliability of UTRS in the assessment of essential tremor (ET) and Parkinson tremor.
The purpose of this study is to see if the study drug Onabotulinumtoxin A (BOTOX®), is safe and helps to reduce upper limb essential tremor in adults (18 to 80 years of age) who experienced persistent, bilateral tremor during movement , involving hands and forearms.
We are using specialized functional MRI for people receiving deep brain stimulation surgery to help predict who will benefit most from this procedure.