The purpose of this research study is to examine whether Methylphenidate (MPD) can result in improvement of gait (walking) in a population of Parkinson's Disease (PD) patients whose main disability is freezing of gait. MPD (Ritalin®) is a drug which can excite or stimulate certain systems of the body that control motor function. This drug is FDA approved for the treatment of attention hyperactivity disorder, a condition unrelated to PD. The researchers hypothesize that daily treatment with a tolerable daily oral dose of MPD will improve gait velocity, stride length, cadence, and decrease freezing of gait, 3 months from treatment initiation in patients with moderately advanced PD, whose gait impairment is an important source of disability despite optimized antiparkinsonian treatment.
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The Primary Outcome Measure Was Change in a Gait Stride Length Between Groups at 12 and 27 Weeks.
Timeframe: Week 12 and 27
The Primary Outcome Measure Was Change in Gait Velocity Between Groups at 12 and 27 Weeks.
Timeframe: Week 12 and 27