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Complex mechanisms of sensory tricks in cervical dystonia

Muscle activities in 26 patients with predominantly rotational torticollis were quantified using surface electromyography. In the subgroup of 19 patients with an effective sensory trick, different modes and bilateral locations of trick application led to significant (P < 0.002) reduction of elect...

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Published in:	Movement disorders 2004-04, Vol.19 (4), p.452-458
Main Authors:	Schramm, Axel, Reiners, Karlheinz, Naumann, Markus
Format:	Article
Language:	English
Subjects:	Biological and medical sciences cervical dystonia Electromyography - instrumentation Female gèste antagonistique Humans Male Medical sciences Middle Aged Muscle, Skeletal - physiopathology Neurology Polysomnography - instrumentation Rotation Sensation - physiology sensory tricks Severity of Illness Index torticollis Torticollis - complications Torticollis - diagnosis Torticollis - physiopathology
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container_title	Movement disorders
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creator	Schramm, Axel Reiners, Karlheinz Naumann, Markus
description	Muscle activities in 26 patients with predominantly rotational torticollis were quantified using surface electromyography. In the subgroup of 19 patients with an effective sensory trick, different modes and bilateral locations of trick application led to significant (P < 0.002) reduction of electromyographic (EMG) activity. A strong correlation was found between the efficacy of trick manoeuvres and the starting head position. Trick application in a neutral or even contralateral position was most effective while no reduction of muscle activity during trick application at the maximum dystonic head position was found (P < 0.001). We propose a two‐phase model: First, normalisation of head posture is obtained by counterpressure or volitional antagonistic muscle activity. In a second step, this position can be stabilised using sensory tricks challenging central adaption of distorted sensorimotor integration. © 2003 Movement Disorder Society
doi_str_mv	10.1002/mds.10689
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subjects	Biological and medical sciences cervical dystonia Electromyography - instrumentation Female gèste antagonistique Humans Male Medical sciences Middle Aged Muscle, Skeletal - physiopathology Neurology Polysomnography - instrumentation Rotation Sensation - physiology sensory tricks Severity of Illness Index torticollis Torticollis - complications Torticollis - diagnosis Torticollis - physiopathology
title	Complex mechanisms of sensory tricks in cervical dystonia
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