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mds25304-sup-0001-suppvideo1.mpg24930KVideo 1. Oromandibular dystonia observed in the patient with SCA36. Segment 1: patient has phasic jaw movements that are partially suppressed by speaking. Jaw movements are not voluntarily suppressed. Segment 2: involuntary tongue movements are occasionally observed.
mds25304-sup-0002-suppvideo2.mpg24824KVideo 2. Symptoms after botulinum toxin injection into masseter muscles and muscle afferent block to the tongue. Segment 1: phasic jaw movements disappear after therapy. The patient can voluntarily open her mouth and thrust her tongue. Segment 2: finger-to-nose testing demonstrates the presence of terminal dysmetria. Decomposition is not elicited by rapid alternating movements; however, slowness of the movements is evident. Heel-knee-shin testing shows mild dysmetria. Wide-based gait is observed; it becomes more marked step after step.

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