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Article: Creation of an asymmetrical gradient of back muscle activity and spinal stiffness during asymmetrical hip extension
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TitleCreation of an asymmetrical gradient of back muscle activity and spinal stiffness during asymmetrical hip extension
 
AuthorsHu, Y1
Wong, YL1 2
Lu, WW1
Kawchuk, GN3
 
Issue Date2009
 
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/clinbiomech
 
CitationClinical Biomechanics, 2009, v. 24 n. 10, p. 799-806 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.clinbiomech.2009.07.013
 
AbstractBackground: Low back pain is often associated with increased spinal stiffness which thought to arise from increased muscle activity. Unfortunately, the association between paraspinal muscle activity and paraspinal stiffness, as well as the spatial distribution of this relation, is unknown. The purpose of this investigation was to employ new technological developments to determine the relation between spinal muscle contraction and spinal stiffness over a large region of the lumbar spine. Methods: Thirty-two male subjects performed graded isometric prone right hip extension at four different exertion levels (0%, 10%, 25% and 50% of the maximum voluntary contraction) to induce asymmetric back muscle activity. The corresponding stiffness and muscle activity over bilateral paraspinal lumbar regions was measured by indentation loading and topography surface electromyography, respectively. Paraspinal stiffness and muscle activity were then plotted and their correlation was determined. Findings: Data from this study demonstrated the existence of an asymmetrical gradient in muscle activation and paraspinal stiffness in the lumbar spine during isometric prone right hip extension. The magnitude and scale of the gradient increased with the contraction force. A positive correlation between paraspinal stiffness and paraspinal muscle activity existed irrespective of the hip extension effort (Pearson correlation coefficient, range 0.566-0.782 (P < 0.001)). Interpretation: Our results demonstrate the creation of an asymmetrical gradient of muscle activity and paraspinal stiffness during right hip extension. Future studies will determine if alterations in this gradient may possess diagnostic or prognostic value for patients with low back pain. © 2009 Elsevier Ltd.
 
ISSN0268-0033
2012 Impact Factor: 1.869
2012 SCImago Journal Rankings: 1.107
 
DOIhttp://dx.doi.org/10.1016/j.clinbiomech.2009.07.013
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorHu, Y
 
dc.contributor.authorWong, YL
 
dc.contributor.authorLu, WW
 
dc.contributor.authorKawchuk, GN
 
dc.date.accessioned2012-10-30T06:05:37Z
 
dc.date.available2012-10-30T06:05:37Z
 
dc.date.issued2009
 
dc.description.abstractBackground: Low back pain is often associated with increased spinal stiffness which thought to arise from increased muscle activity. Unfortunately, the association between paraspinal muscle activity and paraspinal stiffness, as well as the spatial distribution of this relation, is unknown. The purpose of this investigation was to employ new technological developments to determine the relation between spinal muscle contraction and spinal stiffness over a large region of the lumbar spine. Methods: Thirty-two male subjects performed graded isometric prone right hip extension at four different exertion levels (0%, 10%, 25% and 50% of the maximum voluntary contraction) to induce asymmetric back muscle activity. The corresponding stiffness and muscle activity over bilateral paraspinal lumbar regions was measured by indentation loading and topography surface electromyography, respectively. Paraspinal stiffness and muscle activity were then plotted and their correlation was determined. Findings: Data from this study demonstrated the existence of an asymmetrical gradient in muscle activation and paraspinal stiffness in the lumbar spine during isometric prone right hip extension. The magnitude and scale of the gradient increased with the contraction force. A positive correlation between paraspinal stiffness and paraspinal muscle activity existed irrespective of the hip extension effort (Pearson correlation coefficient, range 0.566-0.782 (P < 0.001)). Interpretation: Our results demonstrate the creation of an asymmetrical gradient of muscle activity and paraspinal stiffness during right hip extension. Future studies will determine if alterations in this gradient may possess diagnostic or prognostic value for patients with low back pain. © 2009 Elsevier Ltd.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationClinical Biomechanics, 2009, v. 24 n. 10, p. 799-806 [How to Cite?]
DOI: http://dx.doi.org/10.1016/j.clinbiomech.2009.07.013
 
dc.identifier.citeulike5636315
 
dc.identifier.doihttp://dx.doi.org/10.1016/j.clinbiomech.2009.07.013
 
dc.identifier.epage806
 
dc.identifier.issn0268-0033
2012 Impact Factor: 1.869
2012 SCImago Journal Rankings: 1.107
 
dc.identifier.issue10
 
dc.identifier.pmid19699565
 
dc.identifier.scopuseid_2-s2.0-70349863377
 
dc.identifier.spage799
 
dc.identifier.urihttp://hdl.handle.net/10722/170149
 
dc.identifier.volume24
 
dc.languageeng
 
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/clinbiomech
 
dc.publisher.placeUnited Kingdom
 
dc.relation.ispartofClinical Biomechanics
 
dc.relation.referencesReferences in Scopus
 
dc.subject.meshAdult
 
dc.subject.meshBiomechanics
 
dc.subject.meshElectromyography - Methods
 
dc.subject.meshEquipment Design
 
dc.subject.meshExercise Therapy - Methods
 
dc.subject.meshHip - Physiopathology
 
dc.subject.meshHumans
 
dc.subject.meshLow Back Pain - Physiopathology - Rehabilitation
 
dc.subject.meshLumbar Vertebrae
 
dc.subject.meshLumbosacral Region - Physiology
 
dc.subject.meshMale
 
dc.subject.meshMuscle Fatigue
 
dc.subject.meshMuscle, Skeletal - Metabolism - Pathology - Physiopathology
 
dc.subject.meshSpine
 
dc.subject.meshWeight-Bearing
 
dc.titleCreation of an asymmetrical gradient of back muscle activity and spinal stiffness during asymmetrical hip extension
 
dc.typeArticle
 
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Author Affiliations
  1. The University of Hong Kong Li Ka Shing Faculty of Medicine
  2. Queen Elizabeth Hospital Hong Kong
  3. University of Alberta