Cortical myoclonus in levodopa-responsive parkinsonism.
Identifieur interne : 004468 ( PubMed/Checkpoint ); précédent : 004467; suivant : 004469Cortical myoclonus in levodopa-responsive parkinsonism.
Auteurs : J N Caviness [États-Unis] ; C H Adler ; S. Newman ; R J Caselli ; M D MuenterSource :
- Movement disorders : official journal of the Movement Disorder Society [ 0885-3185 ] ; 1998.
English descriptors
- KwdEn :
- Aged, Antiparkinson Agents (administration & dosage), Brain Mapping, Cerebral Cortex (drug effects), Cerebral Cortex (physiopathology), Electroencephalography (drug effects), Electromyography (drug effects), Follow-Up Studies, Humans, Levodopa (administration & dosage), Male, Myoclonus (drug therapy), Myoclonus (physiopathology), Parkinson Disease (drug therapy), Parkinson Disease (physiopathology).
- MESH :
- chemical , administration & dosage : Antiparkinson Agents, Levodopa.
- drug effects : Cerebral Cortex, Electroencephalography, Electromyography.
- drug therapy : Myoclonus, Parkinson Disease.
- physiopathology : Cerebral Cortex, Myoclonus, Parkinson Disease.
- Aged, Brain Mapping, Follow-Up Studies, Humans, Male.
Abstract
We observed myoclonic movements of the fingers and wrists in two patients with a levodopa-responsive parkinsonian syndrome most consistent with Parkinson's disease. These patients were studied with electrophysiological techniques. Brief (<50 ms) myoclonic electromyographic discharges showed a time-locked relationship to a focal premovement electroencephalographic potential. Somatosensory-evoked potentials were not enlarged and long-latency reflexes were not grossly exaggerated. This pattern of electrophysiological findings can be distinguished from those previously found in other parkinsonian syndromes. These results provide evidence for a cortical origin of the myoclonus seen in these patients.
DOI: 10.1002/mds.870130327
PubMed: 9613750
Affiliations:
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pubmed:9613750Le document en format XML
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<author><name sortKey="Newman, S" sort="Newman, S" uniqKey="Newman S" first="S" last="Newman">S. Newman</name>
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<author><name sortKey="Caselli, R J" sort="Caselli, R J" uniqKey="Caselli R" first="R J" last="Caselli">R J Caselli</name>
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<author><name sortKey="Muenter, M D" sort="Muenter, M D" uniqKey="Muenter M" first="M D" last="Muenter">M D Muenter</name>
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<author><name sortKey="Caselli, R J" sort="Caselli, R J" uniqKey="Caselli R" first="R J" last="Caselli">R J Caselli</name>
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<front><div type="abstract" xml:lang="en">We observed myoclonic movements of the fingers and wrists in two patients with a levodopa-responsive parkinsonian syndrome most consistent with Parkinson's disease. These patients were studied with electrophysiological techniques. Brief (<50 ms) myoclonic electromyographic discharges showed a time-locked relationship to a focal premovement electroencephalographic potential. Somatosensory-evoked potentials were not enlarged and long-latency reflexes were not grossly exaggerated. This pattern of electrophysiological findings can be distinguished from those previously found in other parkinsonian syndromes. These results provide evidence for a cortical origin of the myoclonus seen in these patients.</div>
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<Abstract><AbstractText>We observed myoclonic movements of the fingers and wrists in two patients with a levodopa-responsive parkinsonian syndrome most consistent with Parkinson's disease. These patients were studied with electrophysiological techniques. Brief (<50 ms) myoclonic electromyographic discharges showed a time-locked relationship to a focal premovement electroencephalographic potential. Somatosensory-evoked potentials were not enlarged and long-latency reflexes were not grossly exaggerated. This pattern of electrophysiological findings can be distinguished from those previously found in other parkinsonian syndromes. These results provide evidence for a cortical origin of the myoclonus seen in these patients.</AbstractText>
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