Descending control of muscles in patients with cervical dystonia
Identifieur interne : 004506 ( Main/Exploration ); précédent : 004505; suivant : 004507Descending control of muscles in patients with cervical dystonia
Auteurs : Marina A. J. Tijssen [Royaume-Uni, Pays-Bas] ; Alex Münchau [Royaume-Uni] ; John F. Marsden [Royaume-Uni] ; Andrew Lees (neurologue) [Royaume-Uni] ; Kailash P. Bhatia [Royaume-Uni] ; Peter Brown [Royaume-Uni]Source :
- Movement Disorders [ 0885-3185 ] ; 2002-05.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Homme.
English descriptors
- KwdEn :
- Adult, Aged, Differential diagnostic, Dystonia, Electromyography, Female, Human, Humans, Levator scapulae muscle, Male, Middle Aged, Neck, Neck Muscles (physiopathology), Posture, Sternocleidomastoid muscle, Torticollis, Torticollis (diagnosis), Torticollis (physiopathology), Trapezius muscle, dystonia, frequency analysis, torticollis.
- MESH :
- diagnosis : Torticollis.
- physiopathology : Neck Muscles, Torticollis.
- Adult, Aged, Electromyography, Female, Humans, Male, Middle Aged, Posture.
Abstract
It was reported recently that specific features in the frequency analysis of electromyographic (EMG) activity in the sternocleidomastoid (SCM) and splenius (SPL) muscles were able to distinguish between rotational idiopathic cervical dystonia (CD) and voluntary torticollis in individual subjects. Those with CD showed an abnormal drive to muscles at 5 to 7 Hz and an absence of the normal 10 to 12 Hz peak in the autospectrum of SPL. We sought to determine whether the same abnormalities in the frequency domain are found in complex CD, in which the head is displaced in more than two planes. EMG activity was recorded in the SCM, SPL, trapezius, and levator scapulae muscles bilaterally in 10 patients with complex CD. Frequency analysis of EMG was compared with conventional clinical and polymyographic assessment. The autospectrum of SPL during free dystonic contraction showed an absence of a significant peak at 10 to12 Hz in 8 of the 10 patients. The presence of a 5 to 7 Hz frequency drive showed a significant association with muscle pairs determined as dystonic by means of polymyography (P < 0.005). The neck posture predicted blindly, based on the low‐frequency drive, correlated significantly with the clinical assessment of posture (P < 0.01). Conventional assessment and the results of frequency analysis correlated, suggesting that a low‐frequency drive to neck muscle may be a general feature of simple rotational and more complex cervical dystonia. The pattern of coherence between the EMG in different neck muscles may provide a means of identifying leading dystonic muscles, especially in patients with complex cervical dystonia. © 2002 Movement Disorder Society
Url:
DOI: 10.1002/mds.10121
Affiliations:
- Pays-Bas, Royaume-Uni
- Angleterre, Grand Londres, Hollande-Septentrionale
- Amsterdam, Londres
- National Hospital for Neurology and Neurosurgery
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Le document en format XML
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Adult</term>
<term>Aged</term>
<term>Differential diagnostic</term>
<term>Dystonia</term>
<term>Electromyography</term>
<term>Female</term>
<term>Human</term>
<term>Humans</term>
<term>Levator scapulae muscle</term>
<term>Male</term>
<term>Middle Aged</term>
<term>Neck</term>
<term>Neck Muscles (physiopathology)</term>
<term>Posture</term>
<term>Sternocleidomastoid muscle</term>
<term>Torticollis</term>
<term>Torticollis (diagnosis)</term>
<term>Torticollis (physiopathology)</term>
<term>Trapezius muscle</term>
<term>dystonia</term>
<term>frequency analysis</term>
<term>torticollis</term>
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<keywords scheme="MESH" qualifier="diagnosis" xml:lang="en"><term>Torticollis</term>
</keywords>
<keywords scheme="MESH" qualifier="physiopathology" xml:lang="en"><term>Neck Muscles</term>
<term>Torticollis</term>
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<keywords scheme="MESH" xml:lang="en"><term>Adult</term>
<term>Aged</term>
<term>Electromyography</term>
<term>Female</term>
<term>Humans</term>
<term>Male</term>
<term>Middle Aged</term>
<term>Posture</term>
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<term>Diagnostic différentiel</term>
<term>Dystonie</term>
<term>Electromyographie</term>
<term>Homme</term>
<term>Muscle angulaire omoplate</term>
<term>Muscle sternocléidomastoïdien</term>
<term>Muscle trapèze</term>
<term>Torticolis</term>
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<front><div type="abstract" xml:lang="en">It was reported recently that specific features in the frequency analysis of electromyographic (EMG) activity in the sternocleidomastoid (SCM) and splenius (SPL) muscles were able to distinguish between rotational idiopathic cervical dystonia (CD) and voluntary torticollis in individual subjects. Those with CD showed an abnormal drive to muscles at 5 to 7 Hz and an absence of the normal 10 to 12 Hz peak in the autospectrum of SPL. We sought to determine whether the same abnormalities in the frequency domain are found in complex CD, in which the head is displaced in more than two planes. EMG activity was recorded in the SCM, SPL, trapezius, and levator scapulae muscles bilaterally in 10 patients with complex CD. Frequency analysis of EMG was compared with conventional clinical and polymyographic assessment. The autospectrum of SPL during free dystonic contraction showed an absence of a significant peak at 10 to12 Hz in 8 of the 10 patients. The presence of a 5 to 7 Hz frequency drive showed a significant association with muscle pairs determined as dystonic by means of polymyography (P < 0.005). The neck posture predicted blindly, based on the low‐frequency drive, correlated significantly with the clinical assessment of posture (P < 0.01). Conventional assessment and the results of frequency analysis correlated, suggesting that a low‐frequency drive to neck muscle may be a general feature of simple rotational and more complex cervical dystonia. The pattern of coherence between the EMG in different neck muscles may provide a means of identifying leading dystonic muscles, especially in patients with complex cervical dystonia. © 2002 Movement Disorder Society</div>
</front>
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<li>Royaume-Uni</li>
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<name sortKey="Bhatia, Kailash P" sort="Bhatia, Kailash P" uniqKey="Bhatia K" first="Kailash P." last="Bhatia">Kailash P. Bhatia</name>
<name sortKey="Brown, Peter" sort="Brown, Peter" uniqKey="Brown P" first="Peter" last="Brown">Peter Brown</name>
<name sortKey="Brown, Peter" sort="Brown, Peter" uniqKey="Brown P" first="Peter" last="Brown">Peter Brown</name>
<name sortKey="Brown, Peter" sort="Brown, Peter" uniqKey="Brown P" first="Peter" last="Brown">Peter Brown</name>
<name sortKey="Lees, Andrew" sort="Lees, Andrew" uniqKey="Lees A" first="Andrew" last="Lees">Andrew Lees (neurologue)</name>
<name sortKey="Lees, Andrew" sort="Lees, Andrew" uniqKey="Lees A" first="Andrew" last="Lees">Andrew Lees (neurologue)</name>
<name sortKey="Marsden, John F" sort="Marsden, John F" uniqKey="Marsden J" first="John F." last="Marsden">John F. Marsden</name>
<name sortKey="Munchau, Alex" sort="Munchau, Alex" uniqKey="Munchau A" first="Alex" last="Münchau">Alex Münchau</name>
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<country name="Pays-Bas"><region name="Hollande-Septentrionale"><name sortKey="Tijssen, Marina A J" sort="Tijssen, Marina A J" uniqKey="Tijssen M" first="Marina A. J." last="Tijssen">Marina A. J. Tijssen</name>
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