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A Rare Presentation of Orthostatic Tremor as Abdominal Tremor

Mousele, Christina; Bentley, Paul; Tai, Yen F.

Background: Orthostatic tremor (OT) is a weight-bearing hyperkinetic disorder characterized by unsteadiness while standing that is relieved when sitting or walking.

Case report: A 66-year-old male presented with a 5 year-history of tremor in his abdomen, but only when he stood in a stationary position. The tremor disappeared when he stood or walked. On examination, he had palpable tremor in his rectus abdominis and gastrocnemius virtually instantaneously after standing. His electromyography findings confirmed the presence of a 12-Hz tremor in the tibialis anterior while standing, with subharmonics recorded in the external obliques and rectus abdominis.

Discussion: Our case illustrates an unusual presentation of OT. The diagnosis is supported by its characteristic frequency and specific appearance only during upright stance.

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Title
Tremor and Other Hyperkinetic Movements
DOI
https://doi.org/10.7916/D8W10PTG

More About This Work

Academic Units
Center for Parkinson's Disease and Other Movement Disorders
Published Here
February 19, 2019
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