Action tremor of the legs in essential tremor: Prevalence, clinical correlates, and comparison with age-matched controls

Kathleen L. Poston, Eileen Rios, Elan D. Louis

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

The hallmark feature of essential tremor (ET) is action tremor of the arms. Leg tremor may also occur yet it has not been the central focus of previous studies. Its prevalence has only rarely been reported, its clinical correlates have yet to be explored. Our aims were to report the prevalence and analyze the clinical correlates of leg action tremor in patients with ET and, given the propensity for normal elderly individuals to manifest mild limb tremors, compare the prevalence with that in age-matched controls. Kinetic leg tremor rated ≥1 occurred in 28/63 (44.4%) ET cases and in only 9/63 (14.3%) controls (p < 0.001); moderate leg tremor occurred in 14.3% of cases. Leg tremor severity modestly correlated with disease duration (r = 0.31, p = 0.02). However, the severity and laterality of leg tremor did not correlate with those of arm tremor. The pathophysiological implications of this finding deserve further exploration.

Original languageEnglish (US)
Pages (from-to)602-605
Number of pages4
JournalParkinsonism and Related Disorders
Volume15
Issue number8
DOIs
StatePublished - Sep 1 2009
Externally publishedYes

Keywords

  • Case control study
  • Clinical
  • Correlates
  • Epidemiology
  • Essential tremor
  • Leg tremor

ASJC Scopus subject areas

  • Neurology
  • Geriatrics and Gerontology
  • Clinical Neurology

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