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Movement disorders phenomenology in focal motor seizures
Alfonso Fasano1, Carlo Di Bonaventura2, Francesco Bove3
1Edmond J. Safra Program in Parkinson's Disease, Morton and Gloria Shulman Movement Disorders Clinic, Toronto Western Hospital, UHN, Toronto, Ontario, Canada; Division of Neurology, University of Toronto, Toronto, Ontario, Canada; Krembil Brain Institute, Toronto, Ontario, Canada.
Introduction:
Although focal motor seizures may resemble one or more movement disorders their phenomenology and prevalence remain uncertain.
Methods:
To examine the extent to which focal motor seizures can present with a phenomenology fulfilling diagnostic criteria for movement disorders, 100 consecutive patients with focal motor seizures were rated by movement disorders experts, epileptologists, and general neurologists.
Results:
A focal motor seizure phenomenologically manifested as a defined movement disorder in 29% of the patients from a consecutive video-EEG documented cohort as per consensus among experts: myoclonus and dystonia (10 and 9 cases, respectively) were the most common movement disorders, followed by chorea (4), stereotypies (3) myoclonus-dystonia (2), and tremor (1).
Conclusions:
Movement disorders and focal motor epilepsy share overlapping movement phenomenology.
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