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Article: Creation of an asymmetrical gradient of back muscle activity and spinal stiffness during asymmetrical hip extension

TitleCreation of an asymmetrical gradient of back muscle activity and spinal stiffness during asymmetrical hip extension
Authors
Issue Date2009
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/clinbiomech
Citation
Clinical Biomechanics, 2009, v. 24 n. 10, p. 799-806 How to Cite?
Abstract
Background: 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.
Persistent Identifierhttp://hdl.handle.net/10722/170149
ISSN
2013 Impact Factor: 1.880
2013 SCImago Journal Rankings: 1.223
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHu, Yen_US
dc.contributor.authorWong, YLen_US
dc.contributor.authorLu, WWen_US
dc.contributor.authorKawchuk, GNen_US
dc.date.accessioned2012-10-30T06:05:37Z-
dc.date.available2012-10-30T06:05:37Z-
dc.date.issued2009en_US
dc.identifier.citationClinical Biomechanics, 2009, v. 24 n. 10, p. 799-806en_US
dc.identifier.issn0268-0033en_US
dc.identifier.urihttp://hdl.handle.net/10722/170149-
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.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/clinbiomechen_US
dc.relation.ispartofClinical Biomechanicsen_US
dc.subject.meshAdulten_US
dc.subject.meshBiomechanicsen_US
dc.subject.meshElectromyography - Methodsen_US
dc.subject.meshEquipment Designen_US
dc.subject.meshExercise Therapy - Methodsen_US
dc.subject.meshHip - Physiopathologyen_US
dc.subject.meshHumansen_US
dc.subject.meshLow Back Pain - Physiopathology - Rehabilitationen_US
dc.subject.meshLumbar Vertebraeen_US
dc.subject.meshLumbosacral Region - Physiologyen_US
dc.subject.meshMaleen_US
dc.subject.meshMuscle Fatigueen_US
dc.subject.meshMuscle, Skeletal - Metabolism - Pathology - Physiopathologyen_US
dc.subject.meshSpineen_US
dc.subject.meshWeight-Bearingen_US
dc.titleCreation of an asymmetrical gradient of back muscle activity and spinal stiffness during asymmetrical hip extensionen_US
dc.typeArticleen_US
dc.identifier.emailHu, Y:yhud@hku.hken_US
dc.identifier.emailLu, WW:wwlu@hku.hken_US
dc.identifier.authorityHu, Y=rp00432en_US
dc.identifier.authorityLu, WW=rp00411en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.clinbiomech.2009.07.013en_US
dc.identifier.pmid19699565en_US
dc.identifier.scopuseid_2-s2.0-70349863377en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-70349863377&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume24en_US
dc.identifier.issue10en_US
dc.identifier.spage799en_US
dc.identifier.epage806en_US
dc.identifier.isiWOS:000271784700003-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridHu, Y=7407116091en_US
dc.identifier.scopusauthoridWong, YL=16041106800en_US
dc.identifier.scopusauthoridLu, WW=7404215221en_US
dc.identifier.scopusauthoridKawchuk, GN=6701754578en_US
dc.identifier.citeulike5636315-

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