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EMG coherence and spectral analysis in cervical dystonia: discriminative tools to identify dystonic muscles?
Nijmeijer, S W R; de Bruijn, E; Forbes, P A; Kamphuis, D J; Happee, R; Koelman, J H T M; Tijssen, M A J.
Afiliación
  • Nijmeijer SW; Department of Neurology and Clinical Neurophysiology, Academic Medical Centre, Amsterdam, The Netherlands. Electronic address: s.w.nijmeijer@amc.uva.nl.
  • de Bruijn E; BioMechanical Engineering, Delft University of Technology, Delft, The Netherlands.
  • Forbes PA; BioMechanical Engineering, Delft University of Technology, Delft, The Netherlands.
  • Kamphuis DJ; Department of Neurology, Reinier de Graaf Groep, Delft, The Netherlands.
  • Happee R; BioMechanical Engineering, Delft University of Technology, Delft, The Netherlands.
  • Koelman JH; Department of Neurology and Clinical Neurophysiology, Academic Medical Centre, Amsterdam, The Netherlands.
  • Tijssen MA; Univ Groningen, Univ Med Ctr Groningen, Dept Neurol, Groningen, The Netherlands.
J Neurol Sci ; 347(1-2): 167-73, 2014 Dec 15.
Article en En | MEDLINE | ID: mdl-25305713
OBJECTIVE: Botulinum toxin injections in the dystonic muscles are the preferred treatment for cervical dystonia (CD), but proper selection of the dystonic muscles remains a challenge. We investigated the use of EMG coherence and autospectral analysis as discriminative tools to identify dystonic muscles in CD patients. METHODS: We compared the occurrence of 8-14 Hz autospectral peaks and 4-7 Hz intermuscular coherences between 10 CD patients and 10 healthy controls. Secondly, we compared the muscles with significant 4-7 Hz coherences with the muscles that were selected clinically for botulinum toxin treatment. RESULTS: Autospectral peaks between 8 and 14 Hz were significantly more often absent in the splenius capitis (SPL) muscles of CD patients compared to controls (p<0.01). Contrary to previous findings, there was no significant difference in the occurrence of 4-7 Hz intermuscular coherences between patients and controls and the diagnostic accuracy of coherence analysis to identify the clinically dystonic muscles was low. CONCLUSION: Intermuscular EMG coherence analysis cannot reliably discriminate patients from controls. Autospectral changes in the SPL muscles are a more discriminative feature of CD. In patients, coherence analysis does not seem to be a reliable method to identify dystonic muscles. The clinical relevance and the origin of the autospectral changes need further study.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tortícolis / Toxinas Botulínicas / Electromiografía / Inhibidores de la Liberación de Acetilcolina / Músculos del Cuello Tipo de estudio: Diagnostic_studies / Observational_studies / Prognostic_studies Límite: Adult / Aged / Female / Humans / Male / Middle aged Idioma: En Revista: J Neurol Sci Año: 2014 Tipo del documento: Article Pais de publicación: Países Bajos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tortícolis / Toxinas Botulínicas / Electromiografía / Inhibidores de la Liberación de Acetilcolina / Músculos del Cuello Tipo de estudio: Diagnostic_studies / Observational_studies / Prognostic_studies Límite: Adult / Aged / Female / Humans / Male / Middle aged Idioma: En Revista: J Neurol Sci Año: 2014 Tipo del documento: Article Pais de publicación: Países Bajos