Focal pathological startle following pontine infarction
Identifieur interne : 004457 ( Main/Exploration ); précédent : 004456; suivant : 004458Focal pathological startle following pontine infarction
Auteurs : Shaun R. D. Watson [Australie] ; James G. Colebatch [Australie]Source :
- Movement Disorders [ 0885-3185 ] ; 2002-01.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Adulte.
English descriptors
- KwdEn :
- Acoustic stimulus, Adult, Arm, Bending, Brain stem infarction, Case study, Cerebral Infarction (complications), Cerebral Infarction (pathology), Complication, Electromyography, Evoked Potentials, Auditory, Brain Stem, Evoked Potentials, Somatosensory, Humans, Involuntary movement, Localized, Magnetic Resonance Imaging, Male, Muscle Weakness (diagnosis), Muscle Weakness (etiology), Pathogenesis, Pons (blood supply), Pons (pathology), Pons varolii, Reflex, Startle (physiology), Startle reflex, Upper limb, Videotape Recording.
- MESH :
- blood supply : Pons.
- complications : Cerebral Infarction.
- diagnosis : Muscle Weakness.
- etiology : Muscle Weakness.
- pathology : Cerebral Infarction, Pons.
- physiology : Reflex, Startle.
- Adult, Evoked Potentials, Auditory, Brain Stem, Evoked Potentials, Somatosensory, Humans, Magnetic Resonance Imaging, Male, Videotape Recording.
Abstract
A 36‐year‐old male developed an acute right‐sided weakness due to left‐sided pontine infarction. Two months later, he first noticed sudden right elbow flexion in response to a loud unexpected noise. Detailed electrophysiological assessment was performed. A large, short‐latency (median 39 msec), synchronous electromyographic discharge occurred in the right biceps brachii electrodes following a 50‐msec, 120‐dB 1‐kHz tone burst, with habituation only with very short (30‐second) interstimulus intervals. Less synchronous activity at longer latencies was present both in a number of right‐sided arm muscles at rest and on the clinically unaffected side during a tonic voluntary contraction. We discuss possible underlying mechanisms and our reasons for considering this a focally enhanced startle response. Our report broadens the range of expression of acquired startle disorders. © 2001 Movement Disorder Society.
Url:
DOI: 10.1002/mds.10022
Affiliations:
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Le document en format XML
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<term>Bending</term>
<term>Brain stem infarction</term>
<term>Case study</term>
<term>Cerebral Infarction (complications)</term>
<term>Cerebral Infarction (pathology)</term>
<term>Complication</term>
<term>Electromyography</term>
<term>Evoked Potentials, Auditory, Brain Stem</term>
<term>Evoked Potentials, Somatosensory</term>
<term>Humans</term>
<term>Involuntary movement</term>
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<term>Magnetic Resonance Imaging</term>
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<term>Muscle Weakness (etiology)</term>
<term>Pathogenesis</term>
<term>Pons (blood supply)</term>
<term>Pons (pathology)</term>
<term>Pons varolii</term>
<term>Reflex, Startle (physiology)</term>
<term>Startle reflex</term>
<term>Upper limb</term>
<term>Videotape Recording</term>
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<keywords scheme="MESH" qualifier="diagnosis" xml:lang="en"><term>Muscle Weakness</term>
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<keywords scheme="MESH" qualifier="pathology" xml:lang="en"><term>Cerebral Infarction</term>
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<term>Evoked Potentials, Auditory, Brain Stem</term>
<term>Evoked Potentials, Somatosensory</term>
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<term>Magnetic Resonance Imaging</term>
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<term>Videotape Recording</term>
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<term>Bras</term>
<term>Complication</term>
<term>Electromyographie</term>
<term>Etude cas</term>
<term>Flexion</term>
<term>Localisé</term>
<term>Membre supérieur</term>
<term>Mouvement involontaire</term>
<term>Mâle</term>
<term>Pathogénie</term>
<term>Protubérance annulaire</term>
<term>Ramollissement tronc cérébral</term>
<term>Réflexe sursaut</term>
<term>Stimulus acoustique</term>
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<front><div type="abstract" xml:lang="en">A 36‐year‐old male developed an acute right‐sided weakness due to left‐sided pontine infarction. Two months later, he first noticed sudden right elbow flexion in response to a loud unexpected noise. Detailed electrophysiological assessment was performed. A large, short‐latency (median 39 msec), synchronous electromyographic discharge occurred in the right biceps brachii electrodes following a 50‐msec, 120‐dB 1‐kHz tone burst, with habituation only with very short (30‐second) interstimulus intervals. Less synchronous activity at longer latencies was present both in a number of right‐sided arm muscles at rest and on the clinically unaffected side during a tonic voluntary contraction. We discuss possible underlying mechanisms and our reasons for considering this a focally enhanced startle response. Our report broadens the range of expression of acquired startle disorders. © 2001 Movement Disorder Society.</div>
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