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dc.contributor.authorQuirk, D. Adam
dc.contributor.authorHubley-Kozey, Cheryl
dc.date.accessioned2016-06-02T14:53:09Z
dc.date.available2016-06-02T14:53:09Z
dc.date.issued2014
dc.identifier.citationQuirk, D. A., & Hubley-Kozey, C. L. (2014). Age-related changes in trunk neuromuscular activation patterns during a controlled functional transfer task include amplitude and temporal synergies. Human movement science, 38, 262-280.en_US
dc.identifier.urihttp://hdl.handle.net/10222/71785
dc.identifier.urihttp://dx.doi.org/10.1016/j.humov.2014.08.013
dc.descriptionThe authors acknowledge the staff and students of the Neuromuscular Function Lab for their involvement in data collection and all of the participants.
dc.description.abstractWhile healthy aging is associated with physiological changes that can impair control of trunk motion, few studies examine how spinal muscle responses change with increasing age. This study examined whether older (over 65 years) compared to younger (20–45 years) adults had higher overall amplitude and altered temporal recruitment patterns of trunk musculature when performing a functional transfer task. Surface electromyograms from twelve bilateral trunk muscle (24) sites were analyzed using principal component analysis, extracting amplitude and temporal features (PCs) from electromyographic waveforms. Two PCs explained 96% of the waveform variance. Three factor ANOVA models tested main effects (group, muscle and reach) and interactions for PC scores. Significant (p < .0125) group interactions were found for all PC scores. Post hoc analysis revealed that relative to younger adults, older adults recruited higher agonist and antagonistic activity, demonstrated continuous activation levels in specific muscle sites despite changing external moments, and had altered temporal synergies within abdominal and back musculature. In summary both older and younger adults recruit highly organized activation patterns in response to changing external moments. Differences in temporal trunk musculature recruitment patterns suggest that older adults experience different dynamic spinal stiffness and loading compared to younger adults during a functional lifting task.en_US
dc.description.sponsorshipNova Scotia Health Research Foundation (Grant # Med-4125), and Natural Science and Engineering Research Council of Canada Discovery (Grant # RGPIN371936)en_US
dc.publisherElsevieren_US
dc.relation.ispartofHuman movement scienceen_US
dc.subjectElectromyographyen_US
dc.subjectAging differencesen_US
dc.subjectTrunk musculatureen_US
dc.subjectTemporal patternsen_US
dc.subjectMuscle synergiesen_US
dc.subjectBidirectional momenten_US
dc.titleAge-related changes in trunk neuromuscular activation patterns during a controlled functional transfer task include amplitude and temporal synergiesen_US
dc.typeTexten_US
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