American Academy of Neurology (AAN), Neurology, 4(65), p. 626-628, 2005
DOI: 10.1212/01.wnl.0000172930.63669.c8
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Freezing of gait (FOG) is common in patients with Parkinson disease (PD) and responds poorly to medical treatment. Botulinum toxin A (BTX-A) injections into calf muscles decreased FOG in previous open-label studies. The authors conducted a randomized double-blind placebo-controlled crossover study of BTX-A vs placebo in 12 subjects with PD and FOG. No significant improvement with BTX-A was found using subjective and objective measures.