Orthostatic tremor: Report of two cases and an electrophysiological study

A. Uncini, M. Onofrj, M. Basciani, R. Cutarella, D. Gambi

Research output: Contribution to journalArticlepeer-review

Abstract

Two patients with legs tremor present on standing, but none on walking or sitting, are reported. Tremor was not exclusive of orthostatism and was also evoked by strong tonic contraction of leg muscles. Synchronous EMG bursts were recorded in antagonistic muscle groups at 8-10 Hz in the first patient and at 16 Hz in the second. EMG activity was synchronous in corresponding muscles of both legs. The occurrence of EMG activity was not influenced by stimulation of nerve afferent fibers. We suggest that this movement disorder may be an exaggeration of physiological tremor due to synchronization of motor units by spontaneous oscillations in central structures.

Original languageEnglish
Pages (from-to)119-122
Number of pages4
JournalActa Neurologica Scandinavica
Volume79
Issue number2
Publication statusPublished - 1989

ASJC Scopus subject areas

  • Clinical Neurology
  • Neuroscience(all)

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