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Does posture of the cervical spine influence dorsal neck muscle activity when lifting?
Linköping University, Department of Medical and Health Sciences, Division of Physiotherapy. Linköping University, Faculty of Health Sciences. University of Queensland, St Lucia, Brisbane, Australia.ORCID iD: 0000-0002-6075-4432
University of of Queensland, St Lucia, Brisbane, Australia.
University of of Queensland, St Lucia, Brisbane, Australia.
University of of Queensland, St Lucia, Brisbane, Australia.
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2014 (English)In: Manual Therapy, ISSN 1356-689X, E-ISSN 1532-2769, Vol. 19, no 1, 32-36 p.Article in journal (Refereed) Published
Abstract [en]

Previous studies have shown that postural orientations of the neck, such as flexed or forward head postures, are associated with heightened activity of the dorsal neck muscles. While these studies describe the impact of variations in neck posture alone, there is scant literature regarding the effect of neck posture on muscle activity when combined with upper limb activities such as lifting. The purpose of this study was to evaluate the effect of three different neck postures on the activity of the different layers of the dorsal neck muscles during a lifting task. Ultrasound measurements of dorsal neck muscle deformation were compared over two time points (rest, during lift) during a lifting task performed in three different neck postural conditions (neutral, flexed and forward head posture) in 21 healthy subjects. Data were analysed by post-process speckle tracking analysis. Results demonstrated significantly greater muscle deformation induced by flexed and forward head postures, compared to the neutral posture, for all dorsal neck muscles at rest (pless than. 0.05). Significant condition by time interactions associated with the lift was observed for four out of the five dorsal muscles (pless than. 0.02). These findings demonstrate that posture of the cervical spine influenced the level of muscle deformation not only at rest, but also when lifting. The findings of the study suggest that neck posture should be considered during the evaluation or design of lifting activities as it may contribute to excessive demands on dorsal neck muscles with potential detrimental consequences.

Place, publisher, year, edition, pages
Elsevier, 2014. Vol. 19, no 1, 32-36 p.
Keyword [en]
Cervical posture; Lifting; Neck muscle; Ultrasound
National Category
Health Sciences
URN: urn:nbn:se:liu:diva-110530DOI: 10.1016/j.math.2013.06.003ISI: 000331701100007PubMedID: 23880061ScopusID: 2-s2.0-84891629820OAI: diva2:746670
The Wenner-Gren Foundation
Available from: 2014-09-14 Created: 2014-09-12 Last updated: 2014-10-09Bibliographically approved

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