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mds21928.mpg11467KSegment 1. (Case 1) An 82-year-old man shows anterior upper neck muscles tremor at rest. There is no tremor of the tongue when he speaks or opens his mouth, but videofluroscopy studies show the posterior tongue tremor. Segment 2. (Case 2) An 85-year-old man shows anterior upper neck muscle tremor. This tremor was observed only at rest. Two weeks after the discontinuation of levosulpiride treatment, the tremor disappears completely. Segment 3. (Case 3) A 56-year-man shows irregular anterior upper neck tremor at rest. The tremor disappears completely after a placebo injection.

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