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Speech‐activated myoclonus: An uncommon form of action myoclonus
Author(s) -
Slee Mark,
Parasivam Sharavanan,
Blessing Bill,
Truck Kate,
Day Bruce,
Thyagarajan Dominic
Publication year - 2005
Publication title -
movement disorders
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.352
H-Index - 198
eISSN - 1531-8257
pISSN - 0885-3185
DOI - 10.1002/mds.20505
Subject(s) - myoclonus , myoclonic jerk , jerk , electroencephalography , neuroscience , audiology , electrophysiology , psychology , medicine , neurological disorder , central nervous system disease , physics , classical mechanics , acceleration
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. © 2005 Movement Disorder Society