Linked Life Data

10969200

Source:http://linkedlifedata.com/resource/pubmed/id/10969200

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SubjectPredicateObjectContext
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pubmed-article:10969200pubmed:abstractTextThe purpose of the study was twofold: (1) to evaluate the reliability of distance measures computed from a principal component analysis (PCA) of electromyographic (EMG) waveforms of trunk muscles recorded during standardized trunk movements and (2) to evaluate their sensitivity to the load lifted, the trunk range of motion (ROM) and to low back status. Thirty-three male subjects (18 normals, 15 suffering from non specific CLBP) aged between 35-45 years participated. The EMG signals from 12 trunk muscles and the kinematics of trunk segments were recorded during 12 tasks. The subjects performed flexion-extension and lateral bending (left and right) tasks (three complete cycles) with and without a 12 kg load and at different trunk ROM (maximal or at defined submaximal angles). Distance measures locating each subject relative to a reference PCA model were computed for each muscle and task. The reliability of these distance measures was evaluated for 10 subjects (five normals and five CLBP) who performed two tasks on three different days. The reliability of distance measures was acceptable for agonist muscles only. The distance measures were sensitive to the load lifted and to the trunk ROM for different muscles and tasks but poorly sensitive to low back status. Several reasons that could explain the low sensitivity of these measures to low back status are discussed and potential solutions are proposed. A procedure based on a reliability analysis is proposed to select the number of principal components to include in the reference PCA model. It is expected that the refinement of the method used in this study could provide an effective clinical tool to assess EMG waveforms of trunk muscles during dynamic tasks.lld:pubmed
pubmed-article:10969200pubmed:languageenglld:pubmed
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pubmed-article:10969200pubmed:authorpubmed-author:LarivièreCClld:pubmed
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pubmed-article:10969200pubmed:volume10lld:pubmed
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pubmed-article:10969200pubmed:pagination261-73lld:pubmed
pubmed-article:10969200pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:10969200pubmed:articleTitleAn application of pattern recognition for the comparison of trunk muscles EMG waveforms between subjects with and without chronic low back pain during flexion-extension and lateral bending tasks.lld:pubmed
pubmed-article:10969200pubmed:affiliationFaculté de Médecine, Université de Sherbrooke, Québec, Canada.lld:pubmed
pubmed-article:10969200pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:10969200pubmed:publicationTypeClinical Triallld:pubmed
pubmed-article:10969200pubmed:publicationTypeComparative Studylld:pubmed
pubmed-article:10969200pubmed:publicationTypeRandomized Controlled Triallld:pubmed
pubmed-article:10969200pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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