Reflex myoclonus in olivopontocerebellar atrophy.
case_control · Level III
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- Record sourced from PubMed, PMID 8158179.
- Also identified by PMC identifier 1072821.
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Abstract
The presence of reflex myoclonus in response to touching and pin-pricking the wrist or stretching the fingers and to photic stimulation was assessed in 24 patients with a presumed diagnosis of olivopontocerebellar atrophy (OPCA) and in 30 age matched control subjects. Reflex myoclonus to soma-esthetic stimulation was found in 23 patients and in none of the controls. Photic myoclonus was present in 12 patients and in none of the controls. Electrophysiological study of the reflex myoclonus showed enhanced (> 10 microV) somatosensory evoked potentials and an associated reflex electromyographic discharge (C-wave) in 15 patients. These findings indicate that reflex myoclonus is common in OPCA and probably of cortical origin.
Medical subject headings
- Myoclonus
- Olivopontocerebellar Atrophies