Cited by 1,575Neurological disorders and treatmentsParkinson's Disease Mechanisms and TreatmentsNeurological and metabolic disorders

Consensus Statement on the classification of tremors. from the task force on tremor of the International Parkinson and Movement Disorder Society

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Bhatia, Kailash P., Bain, Peter, Bajaj, Nin, Elble, Rodger J., Hallett, Mark, Louis, Elan D., Raethjen, Jan, Stamelou, Maria +3 more·2018·Movement Disorders

Abstract

Background: Consensus criteria for classifying tremor disorders were published by the International Parkinson and Movement Disorder Society in 1998. Subsequent advances with regard to essential tremor, tremor associated with dystonia, and other monosymptomatic and indeterminate tremors make a significant revision necessary. Objectives: Convene an international panel of experienced investigators to review the definition and classification of tremor. Methods: Computerized MEDLINE searches in January 2013 and 2015 were conducted using a combination of text words and MeSH terms: “tremor”, “tremor disorders”, “essential tremor”, “dystonic tremor”, and “classification” limited to human studies. Agreement was obtained using consensus development methodology during four in‐person meetings, two teleconferences, and numerous manuscript reviews. Results: Tremor is defined as an involuntary, rhythmic, oscillatory movement of a body part and is classified along two axes: Axis 1—clinical characteristics, including historical features (age at onset, family history, and temporal evolution), tremor characteristics (body distribution, activation condition), associated signs (systemic, neurological), and laboratory tests (electrophysiology, imaging); and Axis 2—etiology (acquired, genetic, or idiopathic). Tremor syndromes, consisting of either isolated tremor or tremor combined with other clinical features, are defined within Axis 1. This classification scheme retains the currently accepted tremor syndromes, including essential tremor, and provides a framework for defining new syndromes. Conclusions: This approach should be particularly useful in elucidating isolated tremor syndromes and syndromes consisting of tremor and other signs of uncertain significance. Consistently defined Axis 1 syndromes are needed to facilitate the elucidation of specific etiologies in Axis 2. © 2017 International Parkinson and Movement Disorder Society

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  • All ET participants complied with the Axis 1 definition of ET in the 2018 Consensus Statement, and none met the Axis 1 exclusion criteria for ET and ET plus.

    “All ET participants compiled with the Axis 1 definition of ET in the 2018 Consensus Statement on the Classification of Tremors [54]. No participant with ET met any of the Axis 1 exclusion criteria for ET and ET plus.”
  • The criteria for ET plus do not include tremor severity.

    “While criteria for ET plus do not include tremor severity”
  • All ET participants complied with the Axis 1 definition of ET in the 2018 Consensus Statement on the Classification of Tremors.

    “All complied with the Axis 1 definition of ET in the 2018 Consensus Statement on the Classification of Tremors6.”
  • The sub-classification of ET into ET and ET plus is based on the presence of additional clinical features, the majority of which are unrelated to tremor.

    “The sub-classification of the disorder into ET and ET plus is based on the presence of additional clinical features, the majority of which are unrelated to tremor.”
  • The International Parkinson and Movement Disorders Society Task Force on Tremor has proposed that individuals exhibiting symptoms other than tremor should be labeled as having ET plus syndrome.

    “Very recently, the International Parkinson and Movement Disorders Society Task Force on Tremor has proposed that individuals exhibiting symptoms other than tremor should be labeled as having ET plus syndrome (14).”

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Research works printed but not linked: 4

  1. [2]Marsden CD, Obeso JA, Rothwell J. Benign essential tremor is not a single entity. In: Yahr MD, ed. Current Concepts of Parkinson Disease and Related Disorders Amsterdam: Excerpta Medica; 1983: 31– 46.
  2. [34]MacMahon B, Pugh TF. Causes and entities of disease. In: Clark DW, MacMahon B, eds. Preventive Medicine Boston, MA: Little, Brown; 1967: 26– 33.
  3. [46]Schwingenschuh P, Ruge D, Edwards MJ, Distinguishing SWEDDs patients with asymmetric resting tremor from Parkinson’s disease: a clinical and electrophysiological study. Mov Disord 2011; 25: 560– 569. PMC2996567 20131394
  4. [90]Schiebler S, Schmidt A, Zittel S, Arm tremor in cervical dystonia—is it a manifestation of dystonia or essential tremor? Mov Disord 2011; 26: 1789– 1792. 21735481

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Authors
Bhatia, K. P., Bain, P., Bajaj, N., Elble, R. J., Hallett, M., Louis, E. D., Raethjen, J., Stamelou, M., Testa, C. M., Deuschl, G., & the Tremor Task Force of the International Parkinson and Movement Disorder Society
Affiliations
  • UCL Queen Square Institute of Neurology (GB)
  • Charing Cross Hospital (GB)
  • Nottingham University Hospitals NHS Trust (GB)
  • SIU Medicine (US)
  • National Institutes of Health (US)
  • Yale University (US)
  • Christian-Albrechts-Universität zu Kiel (DE)
  • Department of Neurology, Philipps University, Marburg, Germany; Department of Neurology, Attikon Hospital University of Athens Athens Greece
  • Virginia Commonwealth University (US)
  • Department of Neurology, Universitätsklinikum Schleswig‐Holstein, Kiel Campus Christian Albrechts University Kiel Kiel Germany
Venue
Movement Disorders
Publisher
Wiley
Published
2017-11-30
Volume
33
Issue
1
Pages
75-87
ISSN
  • 0885-3185 (ISSN-L)
  • 1531-8257
OpenAlex
W2773390988
Cited by
1,575
References
93
Citations by year
2026: 179 · 2025: 238 · 2024: 239 · 2023: 202 · 2022: 218 · 2021: 156 · 2020: 149 · 2019: 131 · 2018: 58 · 2017: 3
FWCI
64.91
Type
journal article
Language
en
Open access
Locations
  • Movement Disorders (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • UCL Discovery (University College London) (submittedVersion)
  • Spiral (Imperial College London) (submittedVersion)
Funders
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (Z01NS002667)
Topics
  • Health Sciences › Medicine › Neurology › Neurological disorders and treatments
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Neurological and metabolic disorders
Keywords
tremor classification, essential tremor, dystonic tremor, tremor syndromes, tremor etiology
MeSH terms
Humans, International Cooperation, Societies, Medical, Tremor, MEDLINE, Consensus

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