A hand-held device that strengthens the muscles involved in swallowing can address a serious symptom of Parkinson's disease, according to a new University of Florida study. In what researchers believe is the largest randomized trial of a behavioral swallowing treatment in patients with Parkinson's disease, scientists found that about one-third of the volunteers who used the device improved their ability to swallow. The findings appear in the Nov. 23 issue of the journal Neurology, the medical journal of the American Academy of Neurology... 
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