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Most patients stop drugs for essential tremor after deep brain stimulation surgery
Date:4/7/2011

Tampa, FL (April 7, 2011) -- Deep brain stimulation, a surgical procedure to suppress faulty nerve signals, allowed 77 percent of patients to stop the medications used to treat their essential tremors within one year following the surgery, University of South Florida researchers report.

"It's a significant finding demonstrating that patients see a lot of symptom improvement with this treatment option," said Andrew Resnick, a research assistant in the USF Health Department of Neurology. Resnick will present results of the limited retrospective study April 12, 2011, at the annual meeting of the American Academy of Neurology in Honolulu, Hawaii.

Essential tremor, which affects the hands, head and voice, is three times more prevalent than Parkinson's disease. The largely hereditary neurological condition can cause uncontrollable shaking that interferes with normal daily activities such as eating, drinking and getting dressed. Tremors can begin in early adulthood and become more severe as a person grows older.

While medications (primidone, propranolol and/or topiramate) help alleviate essential tremors in some patients, over time many patients discontinue the drugs because their effectiveness wanes or the side effects become intolerable, said USF Health neurologist Theresa Zesiewicz, MD, who was the lead author in developing the AAN's first guidelines for treatment of essential tremor. "Essentially, they just give up trying to treat essential tremor."

The USF study reviewed the charts of 31 patients who underwent unilateral deep brain stimulation (DBS) surgery for essential tremor from 2000 to 2010. The therapy uses an implanted device similar to a pacemaker to stimulate a targeted region of the brain with electrical impulses, blocking or correcting abnormal nerve signals that cause the tremors.

At the time of surgery, 20 of the 31 patients had been diagnosed with essential tremor for 10 or more years and 11 had
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Contact: Anne DeLotto Baier
abaier@health.usf.edu
813-974-3300
University of South Florida (USF Health)
Source:Eurekalert  

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