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This article includes Supplementary Video, available online at http://www.interscience.wiley.com/jpages/0885-3185/suppmat .

FilenameFormatSizeDescription
jws-mds.20591.mpg13779K Segment 1.The clicking sound emanating from our patient's throat is initially presented on the video. Tremor of the tongue, faucial pillars, and lower jaw is evident. There is no involvement of the uvula or soft palate. The tongue tremor abates with movement of the tongue, vocalization, or gagging on a tongue depressor. Segment 2.Lateral projection videofluoroscopy demonstrates a prominent 4-Hz tremor of the tongue as well as the lower jaw. Movements such as pressing his tongue against the hard palate, clinching his teeth, puffing his cheeks out with air, or talking abated the tongue tremor with return of the tremor in a few seconds. This video presentation has been abbreviated. The full version will appear on theMovementDisorders DVD Supplement, which is issued bi-annually.

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