Abstract
Movement disorders are commonly encountered in the clinic. In this Review, aimed at trainees and general neurologists, we provide a practical step-by-step approach to help clinicians in their 'pattern recognition' of movement disorders, as part of a process that ultimately leads to the diagnosis. The key to success is establishing the phenomenology of the clinical syndrome, which is determined from the specific combination of the dominant movement disorder, other abnormal movements in patients presenting with a mixed movement disorder, and a set of associated neurological and non-neurological abnormalities. Definition of the clinical syndrome in this manner should, in turn, result in a differential diagnosis. Sometimes, simple pattern recognition will suffice and lead directly to the diagnosis, but often ancillary investigations, guided by the dominant movement disorder, are required. We illustrate this diagnostic process for the most common types of movement disorder, namely, akinetic–rigid syndromes and the various types of hyperkinetic disorders (myoclonus, chorea, tics, dystonia and tremor).
Key Points
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The key to diagnosing movement disorders is establishing the phenomenology of the clinical syndrome
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The phenomenology is determined from the specific combination of the dominant movement disorder, the presence of any additional abnormal movements, and any further neurological or non-neurological abnormalities
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A range of conditions, both neurological and non-neurological, can mimic various movement disorders, and it is vital not to miss these lookalikes
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A systematic approach is recommended when clinicians see patients who present with one or more types of movement disorder
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Acknowledgements
This clinical approach was handed down to us by the late Professor David Marsden. This work was supported by The Netherlands Organization for Scientific Research (NWO) Vidi research grant #016.076.352 to B. R. Bloem. W. F. Abdo was supported by a research grant from the Stichting Internationaal Parkinson Fonds.
Désirée Lie, University of California, Orange, is the author of and is solely responsible for the content of the learning objectives, questions and answers of the MedscapeCME-accredited continuing medical education activity associated with this article.
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Supplementary information
Supplementary Table 1
Examples of clinical thinking in myoclonus (DOC 45 kb)
Supplementary Table 2
Examples of clinical thinking in chorea (DOC 43 kb)
Supplementary Table 3
Examples of clinical thinking in dystonia (DOC 54 kb)
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Abdo, W., van de Warrenburg, B., Burn, D. et al. The clinical approach to movement disorders. Nat Rev Neurol 6, 29–37 (2010). https://doi.org/10.1038/nrneurol.2009.196
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DOI: https://doi.org/10.1038/nrneurol.2009.196
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