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Article: Lumbar muscle electromyographic dynamic topography during flexion-extension

TitleLumbar muscle electromyographic dynamic topography during flexion-extension
Authors
KeywordsDynamic topography
Low back pain (LBP)
Lumbar muscle contraction
Quantitative analysis
Surface electromyography (EMG)
Issue Date2010
PublisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jelekin
Citation
Journal Of Electromyography And Kinesiology, 2010, v. 20 n. 2, p. 246-255 How to Cite?
AbstractThe objective of this study is to introduce dynamic topography of surface electromyography (SEMG) to visualize lumbar muscle myoelectric activity and provides a new view to analyze muscle activity in vivo. A total of 20 healthy male subjects and 15 males LBP were enrolled. An electrode-array was applied to the lumbar region to collect SEMG. The root mean square (RMS) value was calculated for each channel, and then a 160×120 matrix was constructed using a linear cubic spline interpolation of each scan to create a 2-D color topographic image. Along a definite interval of action, a series of RMS topography matrices was concatenated as a function of position and time, to form a dynamic topographical video of lumbar muscle activity. Relative area (RA), relative width (RW), relative height (RH) and Width-to-Height Ratio (W/H) were chosen as the four quantitative parameters in measuring topographic features. Normal RMS dynamic topography was found to have a consistent, symmetric pattern with a high intensity area in the paraspinal area. LBP patients had a different RMS dynamic topography, with an asymmetric, broad, or disorganized distribution. Quantitative SEMG features were found significantly different between normal control and LBP. After physiotherapy rehabilitation, the dynamic topography images of LBP tended towards the normal pattern. There are obvious differences in lumbar muscle coordination between healthy subjects and LBP patients. The dynamic topography allows the continuous visualization of the distribution of surface EMG signals and the coordination of muscular contractions. © 2009 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/125205
ISSN
2015 Impact Factor: 1.53
2015 SCImago Journal Rankings: 0.886
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of the Hong Kong SAR, ChinaGRF 712408E
SK Yee Medical Foundation203210
207210
Funding Information:

This study is supported by a grant from the Research Grants Council of the Hong Kong SAR, China (GRF 712408E) and SK Yee Medical Foundation Grant (203210 and 207210).

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorHu, Yen_HK
dc.contributor.authorSiu, SHen_HK
dc.contributor.authorMak, JNen_HK
dc.contributor.authorLuk, KDen_HK
dc.date.accessioned2010-10-31T11:17:24Z-
dc.date.available2010-10-31T11:17:24Z-
dc.date.issued2010en_HK
dc.identifier.citationJournal Of Electromyography And Kinesiology, 2010, v. 20 n. 2, p. 246-255en_HK
dc.identifier.issn1050-6411en_HK
dc.identifier.urihttp://hdl.handle.net/10722/125205-
dc.description.abstractThe objective of this study is to introduce dynamic topography of surface electromyography (SEMG) to visualize lumbar muscle myoelectric activity and provides a new view to analyze muscle activity in vivo. A total of 20 healthy male subjects and 15 males LBP were enrolled. An electrode-array was applied to the lumbar region to collect SEMG. The root mean square (RMS) value was calculated for each channel, and then a 160×120 matrix was constructed using a linear cubic spline interpolation of each scan to create a 2-D color topographic image. Along a definite interval of action, a series of RMS topography matrices was concatenated as a function of position and time, to form a dynamic topographical video of lumbar muscle activity. Relative area (RA), relative width (RW), relative height (RH) and Width-to-Height Ratio (W/H) were chosen as the four quantitative parameters in measuring topographic features. Normal RMS dynamic topography was found to have a consistent, symmetric pattern with a high intensity area in the paraspinal area. LBP patients had a different RMS dynamic topography, with an asymmetric, broad, or disorganized distribution. Quantitative SEMG features were found significantly different between normal control and LBP. After physiotherapy rehabilitation, the dynamic topography images of LBP tended towards the normal pattern. There are obvious differences in lumbar muscle coordination between healthy subjects and LBP patients. The dynamic topography allows the continuous visualization of the distribution of surface EMG signals and the coordination of muscular contractions. © 2009 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier Ltd. The Journal's web site is located at http://www.elsevier.com/locate/jelekinen_HK
dc.relation.ispartofJournal of Electromyography and Kinesiologyen_HK
dc.subjectDynamic topographyen_HK
dc.subjectLow back pain (LBP)en_HK
dc.subjectLumbar muscle contractionen_HK
dc.subjectQuantitative analysisen_HK
dc.subjectSurface electromyography (EMG)en_HK
dc.subject.meshElectromyography - methods-
dc.subject.meshLow Back Pain - physiopathology-
dc.subject.meshLumbar Vertebrae - physiology-
dc.subject.meshMovement-
dc.subject.meshMuscle Contraction-
dc.titleLumbar muscle electromyographic dynamic topography during flexion-extensionen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1050-6411&volume=20&issue=2&spage=246&epage=255&date=2010&atitle=Lumbar+muscle+electromyographic+dynamic+topography+during+flexion-extension-
dc.identifier.emailHu, Y:yhud@hku.hken_HK
dc.identifier.emailLuk, KD:hcm21000@hku.hken_HK
dc.identifier.authorityHu, Y=rp00432en_HK
dc.identifier.authorityLuk, KD=rp00333en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jelekin.2009.05.002en_HK
dc.identifier.pmid19540776-
dc.identifier.scopuseid_2-s2.0-74849112725en_HK
dc.identifier.hkuros180201en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-74849112725&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume20en_HK
dc.identifier.issue2en_HK
dc.identifier.spage246en_HK
dc.identifier.epage255en_HK
dc.identifier.eissn1873-5711-
dc.identifier.isiWOS:000274980100009-
dc.publisher.placeUnited Kingdomen_HK
dc.relation.projectProvision of individualized biomechanical and electrophysiological service for occupational low back disorder patients-
dc.relation.projectBiomedical and electrophysiological guidance for low back pain rehabilitation and prevention-
dc.identifier.scopusauthoridHu, Y=7407116091en_HK
dc.identifier.scopusauthoridSiu, SH=26647954600en_HK
dc.identifier.scopusauthoridMak, JN=35980187600en_HK
dc.identifier.scopusauthoridLuk, KD=7201921573en_HK
dc.identifier.citeulike5469558-

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