Trick maneuvers in cervical dystonia: Investigation of movement‐ and touch‐related changes in polymyographic activity
Identifieur interne : 002A95 ( Istex/Corpus ); précédent : 002A94; suivant : 002A96Trick maneuvers in cervical dystonia: Investigation of movement‐ and touch‐related changes in polymyographic activity
Auteurs : Jörg Wissel ; Jörg Müller ; Georg Ebersbach ; Werner PoeweSource :
- Movement Disorders [ 0885-3185 ] ; 1999-11.
English descriptors
Abstract
Antagonistic gestures or trick maneuvers are well‐known clinical features to reduce or abolish dystonic posturing in cervical dystonia (CD). The maneuvers typically consist of a finger touch to the facial skin but their physiology remains unknown. To determine the temporal profile of geste maneuver performance, 25 patients with idiopathic CD were studied by means of polymyography of six cervical muscles prior to any botulinum toxin treatment. Two piezoelectric elements fixed to a fingertip of the hand involved in the trick maneuver and to the facial target region, respectively, were used to relate the essential points of the trick maneuver time course (start of geste‐arm movement, facial contact, end of contact, end of movement) to changes in polymyographic activity. Thirteen patients (52%) showed marked reductions of electromyographic (EMG) activity (≥50% in at least one muscle) during arm movement, definitely prior to contact between fingers and facial target area; in the remaining 12 patients (48%), geste‐related EMG effects were confined to facial–finger contact. These results might indicate different physiological mechanisms in clinically indistinguishable antagonistic gestures.
Url:
DOI: 10.1002/1531-8257(199911)14:6<994::AID-MDS1013>3.0.CO;2-K
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ISTEX:83079AD7DFDA83A77D73560FE345C1AB7C29008CLe document en format XML
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These results might indicate different physiological mechanisms in clinically indistinguishable antagonistic gestures.</div></front></TEI><istex><corpusName>wiley</corpusName><author><json:item><name>Jörg Wissel MD</name><affiliations><json:string>Department of Neurology, University of Innsbruck, Austria</json:string></affiliations></json:item><json:item><name>Jörg Müller MD</name><affiliations><json:string>Department of Neurology, University of Innsbruck, Austria</json:string></affiliations></json:item><json:item><name>Georg Ebersbach MD</name><affiliations><json:string>Department of Neurology, University of Innsbruck, Austria</json:string></affiliations></json:item><json:item><name>Werner Poewe MD</name><affiliations><json:string>Department of Neurology, University of Innsbruck, Austria</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>Cervical dystonia</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Antagonistic gesture</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>Trick maneuver</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>EMG polygraphy</value></json:item></subject><language><json:string>eng</json:string></language><abstract>Antagonistic gestures or trick maneuvers are well‐known clinical features to reduce or abolish dystonic posturing in cervical dystonia (CD). 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The maneuvers typically consist of a finger touch to the facial skin but their physiology remains unknown. To determine the temporal profile of geste maneuver performance, 25 patients with idiopathic CD were studied by means of polymyography of six cervical muscles prior to any botulinum toxin treatment. Two piezoelectric elements fixed to a fingertip of the hand involved in the trick maneuver and to the facial target region, respectively, were used to relate the essential points of the trick maneuver time course (start of geste‐arm movement, facial contact, end of contact, end of movement) to changes in polymyographic activity. Thirteen patients (52%) showed marked reductions of electromyographic (EMG) activity (≥50% in at least one muscle) during arm movement, definitely prior to contact between fingers and facial target area; in the remaining 12 patients (48%), geste‐related EMG effects were confined to facial–finger contact. 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The maneuvers typically consist of a finger touch to the facial skin but their physiology remains unknown. To determine the temporal profile of geste maneuver performance, 25 patients with idiopathic CD were studied by means of polymyography of six cervical muscles prior to any botulinum toxin treatment. Two piezoelectric elements fixed to a fingertip of the hand involved in the trick maneuver and to the facial target region, respectively, were used to relate the essential points of the trick maneuver time course (start of geste‐arm movement, facial contact, end of contact, end of movement) to changes in polymyographic activity. Thirteen patients (52%) showed marked reductions of electromyographic (EMG) activity (≥50% in at least one muscle) during arm movement, definitely prior to contact between fingers and facial target area; in the remaining 12 patients (48%), geste‐related EMG effects were confined to facial–finger contact. These results might indicate different physiological mechanisms in clinically indistinguishable antagonistic gestures.</abstract><subject lang="en"><genre>Keywords</genre><topic>Cervical dystonia</topic><topic>Antagonistic gesture</topic><topic>Trick maneuver</topic><topic>EMG polygraphy</topic></subject><relatedItem type="host"><titleInfo><title>Movement Disorders</title><subTitle>Official Journal of the Movement Disorder Society</subTitle></titleInfo><titleInfo type="abbreviated"><title>Mov. 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