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  Vol. 43 No. 10, October 1986 TABLE OF CONTENTS
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Segmental Myoclonus

Clinical and Pharmacologic Study

Joseph Jankovic, MD; Ricardo Pardo, MD

Arch Neurol. 1986;43(10):1025-1031.


Abstract

• We observed 37 patients (mean age at onset, 48.5 years; range, 13 to 84 years) with segmental myoclonus (18 branchial, 19 spinal). Etiologies for branchial myoclonus included brain-stem demyelination, cerebrovascular disease, Meige's syndrome, cerebral arteritis secondary to bacterial meningitis, central nervous system Whipple's disease, acute cervicomedullary trauma, and cerebellar degeneration. Spinal myoclonus was associated with laminectomy, remote effect of cancer, spinal cord injury, postoperative pseudomeningocele, laparotomy, thoracic sympathectomy, poliomyelitis, herpes myelitis, lumbosacral radiculopathy, spinal extradural block, and myelopathy due to demyelination, electrical injury, acquired immunodeficiency syndrome, and cervical spondylosis. The latency between the predisposing condition and the onset of myoclonus ranged from immediate to 33 years (mean, 2.9 years). In six patients, the myoclonus was the presenting symptom of a serious underlying disease. Treatment with clonazepam, tetrabenazine hydrochloride, or other medications provides a satisfactory control in most patients.



Author Affiliations

From the Department of Neurology, Baylor College of Medicine, Houston (Dr Jankovic) and the Department of Neurology, University of Texas Medical School at Houston (Dr Pardo).


Footnotes

Accepted for publication June 15, 1986.

Reprint requests to the Department of Neurology, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030 (Dr Jankovic).



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