Quantification of Muscular Demands in the Elderly: Electromyography vs. Joint Moments

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dc.contributor.authorChen, Chu Jui, 1981-
dc.date.accessioned2008-10-15T18:06:57Z
dc.date.available2008-10-15T18:06:57Z
dc.date.issued2008-06
dc.descriptionxi, 75 p. : ill. A print copy of this title is available through the UO Libraries under the call numbers: SCIENCE QP310.W3 C44 2008en
dc.description.abstractThis study was performed to evaluate the sensitivity of using electromyography (EMG) and joint moment to quantify muscular challenges in elderly adults. Twenty elderly and young adults walked on level ground and crossed an obstacle. Resultant hip, knee, and ankle joint moments and EMG data from muscles of the dominant leg were analyzed. Older adults demonstrated significantly greater normalized EMG (N-EMG) magnitudes than young adults in most muscles. However, only hip abductor moment demonstrated significant group differences. Stepping over a higher obstacle resulted in greater N-EMG magnitudes in all muscles. Leading limb knee extensor moment was found to significantly decrease with increasing obstacle height, while N-EMGs of knee joint muscles increased. Our findings suggest that N-EMG, which can better account for co-activation of agonist and antagonist muscles, might be a more sensitive parameter than the joint moment in detecting age- and task-related differences.en
dc.description.sponsorshipAdviser: Li-Shan Chouen
dc.format.extent26968 bytes
dc.format.extent1033081 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/1794/7480
dc.language.isoen_USen
dc.publisherUniversity of Oregonen
dc.relation.ispartofseriesUniversity of Oregon theses, Dept. of Human Physiology, M.S., 2008en
dc.titleQuantification of Muscular Demands in the Elderly: Electromyography vs. Joint Momentsen
dc.title.alternativeElectromyography vs. Joint Momentsen
dc.typeThesisen

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