How are myoclonic movements differentiated from hemifacial spasm?

Updated: Sep 16, 2019
  • Author: Steven Gulevich, MD; Chief Editor: Nicholas Lorenzo, MD, MHA, CPE  more...
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Myoclonic movements affecting facial musculature also may arise from lesions at the brain or brainstem level. These are distinguished from hemifacial spasm by the distribution of abnormal movements (more generalized, possibly bilateral) and possibly by electrodiagnostic evaluation. Imaging studies may yield an underlying cause. Central myoclonus responds to anticonvulsant management.

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