Speech-activated myoclonus: An uncommon form of action myoclonus

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) ba...

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Bibliographic Details
Published in:Movement disorders 2005-09, Vol.20 (9), p.1120-1126
Main Authors: Slee, Mark, Parasivam, Sharavanan, Blessing, Bill, Truck, Kate, Day, Bruce, Thyagarajan, Dominic
Format: Article
Language:English
Subjects:
Adult
Aged
Alzheimer Disease - epidemiology
Alzheimer Disease - pathology
Alzheimer Disease - physiopathology
Anticonvulsants. Antiepileptics. Antiparkinson agents
Biological and medical sciences
Brain - metabolism
Brain - pathology
Brain - physiopathology
Cerebral Ventricles - pathology
Cerebral Ventricles - physiopathology
Electroencephalography
Electromyography
Evoked Potentials, Somatosensory - physiology
Face - innervation
Facial Muscles - innervation
Facial Muscles - physiopathology
Female
Humans
Male
Medical sciences
Myoclonus - diagnosis
Myoclonus - etiology
Myoclonus - physiopathology
Nervous system (semeiology, syndromes)
Nervous system as a whole
Neurology
Neuropharmacology
Parietal Lobe - metabolism
Parietal Lobe - pathology
Parietal Lobe - physiopathology
Pharmacology. Drug treatments
Positron-Emission Tomography
Schizophrenia - epidemiology
Schizophrenia - pathology
Schizophrenia - physiopathology
Speech - physiology
speech-activated facial myoclonus
Tomography, Emission-Computed, Single-Photon
Verbal Behavior
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Description
Summary: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
ISSN:0885-3185
1531-8257
DOI:10.1002/mds.20505