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Dystonic neck muscles show a shift in relative autospectral power during isometric contractions.
De Bruijn, E; Nijmeijer, S W R; Forbes, P A; Koelman, J H T M; Van Der Helm, F C T; Tijssen, M A J; Happee, R.
Afiliación
  • De Bruijn E; Biomechanical Engineering, Delft University of Technology, Mekelweg 2, 2628CD Delft, The Netherlands.
  • Nijmeijer SWR; Academic Medical Center, Neurology/Clinical Neurophysiology, Meibergdreef 9, 1105AZ Amsterdam, The Netherlands.
  • Forbes PA; Biomechanical Engineering, Delft University of Technology, Mekelweg 2, 2628CD Delft, The Netherlands.
  • Koelman JHTM; Academic Medical Center, Neurology/Clinical Neurophysiology, Meibergdreef 9, 1105AZ Amsterdam, The Netherlands.
  • Van Der Helm FCT; Biomechanical Engineering, Delft University of Technology, Mekelweg 2, 2628CD Delft, The Netherlands.
  • Tijssen MAJ; University Groningen, University Medical Centre of Groningen, Department of Neurology, Hanzeplein 1, 9713GZ Groningen, The Netherlands.
  • Happee R; Biomechanical Engineering, Delft University of Technology, Mekelweg 2, 2628CD Delft, The Netherlands. Electronic address: R.Happee@tudelft.nl.
Clin Neurophysiol ; 128(10): 1937-1945, 2017 10.
Article en En | MEDLINE | ID: mdl-28826024
OBJECTIVE: To identify effects of a deviant motor drive in the autospectral power of dystonic muscles during voluntary contraction in cervical dystonia patients. METHODS: Submaximal (20%) isometric head-neck tasks were performed with the head fixed, measuring surface EMG of the sternocleidomastoid, splenius capitis and semispinalis capitis in CD patients and controls. Autospectral power of muscle activity, and head forces was analyzed using cumulative distribution functions (CDF). A downward shift between the theta/low alpha-band (3-10Hz) and the high alpha/beta-band (10-30Hz) was detected using the CDF10, defined as the cumulative power from 3 to 10Hz relative to power from 3 to 30Hz. RESULTS: CDF10 was increased in dystonic muscles compared to controls and patient muscles unaffected by dystonia, due to a 3-10Hz power increase and a 10-30Hz decrease. CDF10 also increased in patient head forces. CONCLUSIONS: Submaximal isometric contractions with the head fixed provided a well-defined test condition minimizing effects of reflexive feedback and tremor. We associate shifts in autospectral power with prokinetic sensorimotor control. SIGNIFICANCE: Analysis of autospectral power in isometric tasks with the head fixed is a promising approach in research and diagnostics of cervical dystonia.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Desempeño Psicomotor / Tortícolis / Electromiografía / Retroalimentación Sensorial / Contracción Isométrica / Músculos del Cuello Tipo de estudio: Diagnostic_studies / Prognostic_studies Límite: Adult / Aged / Female / Humans / Male / Middle aged Idioma: En Revista: Clin Neurophysiol Asunto de la revista: NEUROLOGIA / PSICOFISIOLOGIA Año: 2017 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Países Bajos
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Desempeño Psicomotor / Tortícolis / Electromiografía / Retroalimentación Sensorial / Contracción Isométrica / Músculos del Cuello Tipo de estudio: Diagnostic_studies / Prognostic_studies Límite: Adult / Aged / Female / Humans / Male / Middle aged Idioma: En Revista: Clin Neurophysiol Asunto de la revista: NEUROLOGIA / PSICOFISIOLOGIA Año: 2017 Tipo del documento: Article País de afiliación: Países Bajos Pais de publicación: Países Bajos