Focal pathological startle following pontine infarction
Identifieur interne : 001125 ( Istex/Corpus ); précédent : 001124; suivant : 001126Focal pathological startle following pontine infarction
Auteurs : Shaun R. D. Watson ; James G. ColebatchSource :
- Movement Disorders [ 0885-3185 ] ; 2002-01.
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
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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.</abstract><note type="content">*A videotape accompanies this article.</note><relatedItem type="host"><titleInfo><title>Movement Disorders</title></titleInfo><titleInfo type="abbreviated"><title>Mov. 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