Action‐induced clonus mimicking tremor
Identifieur interne : 002A17 ( Main/Exploration ); précédent : 002A16; suivant : 002A18Action‐induced clonus mimicking tremor
Auteurs : Valérie Fraix [France] ; Isabelle Delalande [France] ; Marianne Parrache [France] ; Philippe Derambure [France] ; François Cassim [France]Source :
- Movement Disorders [ 0885-3185 ] ; 2008-01-30.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
- Action tremor, Adult, Differential diagnostic, Electromyography (methods), Humans, Male, Middle Aged, Motor pathway, Muscle Contraction, Muscle Spasticity (physiopathology), Nervous system diseases, Posture (physiology), Reflex, Stretch (physiology), Spasticity, Spinal Cord Ischemia (complications), Stretch reflex, Tremor (etiology), Tremor (pathology), Upper Extremity (physiopathology), action tremor, central motor pathways., clonus, spasticity, stretch reflex, tremor.
- MESH :
- complications : Spinal Cord Ischemia.
- etiology : Tremor.
- methods : Electromyography.
- pathology : Tremor.
- physiology : Posture, Reflex, Stretch.
- physiopathology : Muscle Spasticity, Upper Extremity.
- Adult, Humans, Male, Middle Aged, Muscle Contraction.
Abstract
Action tremor has been described in cerebellar, task‐specific, dystonic, or Holmes tremor. We report 2 patients who developed unilateral kinetic or isometric action tremor of the upper extremity, following cervical spondylotic myelopathy and capsular ischemic stroke. Slight motor weakness and spasticity with exaggerated tendon jerks and passive stretch‐induced clonus were present on the same limb. The central motor pathways lesions might have been responsible for a hyperexcitability of the stretch‐reflex arc and an enhancement of the coactivation of skeletal muscles through a loss of the descending or segmental control of the spinal reflexes. The unusual topography of the symptoms, their occurrence during motion, and the similar frequency of the passive clonus and the action tremor, led us to hypothesize that both patients had prolonged action‐induced clonus, mimicking action tremor. Lesions of the central motor pathways lesions might be responsible for action tremor under certain conditions © 2007 Movement Disorder Society
Url:
DOI: 10.1002/mds.21826
Affiliations:
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Le document en format XML
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<front><div type="abstract" xml:lang="en">Action tremor has been described in cerebellar, task‐specific, dystonic, or Holmes tremor. We report 2 patients who developed unilateral kinetic or isometric action tremor of the upper extremity, following cervical spondylotic myelopathy and capsular ischemic stroke. Slight motor weakness and spasticity with exaggerated tendon jerks and passive stretch‐induced clonus were present on the same limb. The central motor pathways lesions might have been responsible for a hyperexcitability of the stretch‐reflex arc and an enhancement of the coactivation of skeletal muscles through a loss of the descending or segmental control of the spinal reflexes. The unusual topography of the symptoms, their occurrence during motion, and the similar frequency of the passive clonus and the action tremor, led us to hypothesize that both patients had prolonged action‐induced clonus, mimicking action tremor. Lesions of the central motor pathways lesions might be responsible for action tremor under certain conditions © 2007 Movement Disorder Society</div>
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