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Directional preference of activation of abdominal and paraspinal muscles during position-control tasks in sitting
Örebro University, School of Medical Sciences. Örebro University Hospital. University Health Care Research Centre.ORCID iD: 0000-0003-3474-3200
School of Biomedical Sciences, University of Queensland, Brisbane, Australia.
School of Health and Rehabilitation Sciences, University of Queensland, Brisbane, Australia.
School of Health and Rehabilitation Sciences, University of Queensland, Brisbane, Australia.
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2017 (English)In: Journal of Electromyography & Kinesiology, ISSN 1050-6411, E-ISSN 1873-5711, Vol. 35, 9-16 p.Article in journal (Refereed) Published
Abstract [en]

Controversy exists in the literature regarding antagonist activity of trunk muscles during different types of trunk loading, and the direction-specificity of activation of trunk muscles, particularly the deeper trunk muscles. This study aimed to systematically compare activation of a range of trunk muscles between directions of statically applied loads, and to consider the impact of breathing in this activation. In a semi-seated position, 13 healthy male participants resisted moderate inertial loads applied to the trunk in eight different directions. Intramuscular electromyography was recorded from eight abdominal and back muscles on the right side during 1 s prior to peak inspiration/expiration. All muscles demonstrated a directional preference of activation. No muscle displayed antagonistic activation during loading conditions of an intensity that exceded that recorded in upright sitting without a load. During these moderate intensity sustained efforts, trunk muscle activation varied little between respiratory phases. Antagonistic muscle activation of amplitude equivalent to the activation recorded in upright sitting without load is sufficient to maintain control of the spine during predictable and sustained low load tasks.

Place, publisher, year, edition, pages
Elsevier, 2017. Vol. 35, 9-16 p.
Keyword [en]
Motor control, Electromyography, Transversus abdominis, Co-activation, Antagonist, Spine stability
National Category
Neurology
Identifiers
URN: urn:nbn:se:oru:diva-60603DOI: 10.1016/j.jelekin.2017.05.002ISI: 000407808500002PubMedID: 28544940Scopus ID: 2-s2.0-85019943170OAI: oai:DiVA.org:oru-60603DiVA: diva2:1138368
Funder
Forte, Swedish Research Council for Health, Working Life and Welfare, 2012-1475
Note

Funding Agencies:

NHMRC  ID631717 

National Health and Medical Research Council of Australia (NHMRC)  ID401599  ID1009410 

Available from: 2017-09-05 Created: 2017-09-05 Last updated: 2017-10-05Bibliographically approved

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CiteExportLink to record
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