TY - JOUR
T1 - Problems and controversies in tremor classification
AU - Louis, Elan D.
AU - Bain, Peter G.
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/4/15
Y1 - 2022/4/15
N2 - The Consensus Statement on the Classification of Tremors, from the Task Force of the International Parkinson's and Movement Disorder Society was published in 2018 in response to advances in the understanding of essential tremor (ET), tremor associated with dystonia and other monosymptomatic and indeterminate tremors. This was a revision of the previous 1998 Consensus Statement. A number of problems arise from this classification and, in this manuscript, we highlight several of these. These problems relate to the definition of tremor, the definition of ET, the proposal of the term ‘essential tremor plus’, issues related to orthostatic tremor (OT) including the proposal of the term ‘orthostatic tremor plus’, and the absence of a hierarchy of terms used to classify tremor. Among the proposals we make is that the definition of tremor should acknowledge that tremor is a symptom, ET should be redefined, severity is an important characteristic for classifying and diagnosing tremor, the terms ‘essential tremor plus’ and ‘orthostatic tremor plus’ should be abandoned, and classification of tremor requires rules for creating a hierarchy of terminology. "This article is part of the Special Issue ""Tremor"" edited by Daniel D. Truong, Mark Hallett, and Aasef Shaikh".
AB - The Consensus Statement on the Classification of Tremors, from the Task Force of the International Parkinson's and Movement Disorder Society was published in 2018 in response to advances in the understanding of essential tremor (ET), tremor associated with dystonia and other monosymptomatic and indeterminate tremors. This was a revision of the previous 1998 Consensus Statement. A number of problems arise from this classification and, in this manuscript, we highlight several of these. These problems relate to the definition of tremor, the definition of ET, the proposal of the term ‘essential tremor plus’, issues related to orthostatic tremor (OT) including the proposal of the term ‘orthostatic tremor plus’, and the absence of a hierarchy of terms used to classify tremor. Among the proposals we make is that the definition of tremor should acknowledge that tremor is a symptom, ET should be redefined, severity is an important characteristic for classifying and diagnosing tremor, the terms ‘essential tremor plus’ and ‘orthostatic tremor plus’ should be abandoned, and classification of tremor requires rules for creating a hierarchy of terminology. "This article is part of the Special Issue ""Tremor"" edited by Daniel D. Truong, Mark Hallett, and Aasef Shaikh".
KW - Essential tremor
KW - Essential tremor plus
KW - Internal tremor
KW - Orthostatic tremor
KW - Tremor classification
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U2 - 10.1016/j.jns.2022.120204
DO - 10.1016/j.jns.2022.120204
M3 - Review article
C2 - 35279635
AN - SCOPUS:85125755007
SN - 0022-510X
VL - 435
JO - Journal of the Neurological Sciences
JF - Journal of the Neurological Sciences
M1 - 120204
ER -