Speech-activated myoclonus: An uncommon form of action myoclonus

Mark Slee, Sharavanan Parasivam, Bill Blessing, Kate Truck, Bruce Day, Dominic Thyagarajan

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We describe an unusual form of facial myoclonus activated by speech in 3 patients with different underlying neurological diseases and present the electrophysiological investigations and results of structural and functional imaging. In 1 of 2 patients in whom jerk-locked electroencephalogram (EEG) back-averaging was done, a cortical potential clearly preceded the facial jerks. In the second patient, a cortical potential preceding the jerk was not certain. In the third patient, the resting EEG contained outbursts of symmetric, slower frequencies of indeterminate significance. An epileptiform disorder was suspected in this patient.

Original languageEnglish
Pages (from-to)1120-1126
Number of pages7
JournalMovement Disorders
Issue number9
Publication statusPublished - Sep 2005
Externally publishedYes


  • Speech-activated facial myoclonus

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