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Case Reports
. 2007 Aug 15;22(11):1652-6.
doi: 10.1002/mds.21621.

Dopa-responsive Pseudo-Orthostatic Tremor in Parkinsonism

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Case Reports

Dopa-responsive Pseudo-Orthostatic Tremor in Parkinsonism

Astrid Thomas et al. Mov Disord. .

Abstract

In four patients an inabilitating standing tremor appeared years before that parkinsonian symptoms were evidenced. This tremor was refractory to gabapentin and dramatically responded to Levodopa administration. Its dominant frequency was 6.2 to 6.9 Hz with sporadic subharmonics at 8 to 18 Hz. Three patients were affected by different genetic mutations (Park 2, Park 6, mtDNA deletion) in one no genetic or metabolic alterations could be evidenced. All patients had dopamine transporter abnormalities. We suggest that the term "Pseudo-Orthostatic Tremor" could be used to define this Dopa responsive, 6 to 7 Hz standing tremor.

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