The evolving definition of essential tremor: What are we dealing with?

Research output: Contribution to journalArticlepeer-review

38 Scopus citations


Background Although essential tremor (ET) is commonly encountered in clinical practice, historically, there has been considerable disagreement as how to best define it, and now with a growing sense of its clinical complexity, how to best encapsulate it. Here, I draw attention to five issues of current uncertainty. Methods A PubMed search conducted on June 19, 2017 crossed “essential tremor” with 9 second search terms (e.g., definition, diagnosis). Results There are several major issues of clinical and diagnostic uncertainty. Underlying each issue is a larger question about the nature of the underlying pathophysiology of ET. Does age of onset of ET matter? How much dystonia is acceptable in ET? How much in the way of “cerebellar signs” are acceptable? Are non-motor features due to the underlying disease or merely secondary to the clinical features? Is ET a single disease entity or something else? Conclusions We are learning more about ET and, as a by-product of these efforts, are struggling with its definition. Further understanding the nature of the underlying disease pathogenesis as well as the role the cerebellum and cerebellar relays play in this process will likely provide important clues to enable us to bring order to areas of uncertainty.

Original languageEnglish (US)
Pages (from-to)S87-S91
JournalParkinsonism and Related Disorders
StatePublished - Jan 2018
Externally publishedYes


  • Ataxia
  • Cerebellum
  • Clinical
  • Cognition
  • Definition
  • Diagnosis
  • Dystonia
  • Essential tremor
  • Pathophysiology
  • Premotor

ASJC Scopus subject areas

  • Neurology
  • Geriatrics and Gerontology
  • Clinical Neurology


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