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dc.contributor.advisorFuglevand, Andrew
dc.contributor.authorShao, Siyi
dc.creatorShao, Siyi
dc.date.accessioned2020-02-13T03:11:12Z
dc.date.available2020-02-13T03:11:12Z
dc.date.issued2019-12
dc.identifier.urihttp://hdl.handle.net/10150/637033
dc.description.abstractThe properties of motor units have been well studied in anesthetized rats with current injection. Investigators have collected a large amount of data to support hypotheses about the relationship between firing rates and force. However, a very limited number of studies have been done in awake animals doing voluntary contractions. Because it is suggested that discharge properties of motor units mediated by current injection are different from that with natural synaptic inputs in intact animals, the current study aims to identify differences between the two modalities of activation. We recorded motor unit activity using intramuscular electromyography in left hindlimbs of 5 rats after they underwent behavioral training protocol to perform isometric plantar flexion. We found that the minimum firing rates in intact rats are much lower than those in current injection studies, while the positive relationship between firing rate and force still exists. Possible reasons for the results we observed are discussed, and we proposed some modifications for future studies based on limitations faced in the current one.en_US
dc.language.isoenen_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.titleFIRING PROPERTIES OF RAT MOTOR UNITS DURING VOLUNTARY CONTRACTIONen_US
dc.typetexten_US
dc.typeElectronic Thesisen_US
thesis.degree.grantorUniversity of Arizonaen_US
thesis.degree.levelbachelorsen_US
thesis.degree.disciplineHonors Collegeen_US
thesis.degree.disciplinePhysiologyen_US
thesis.degree.nameB.S.H.S.en_US
refterms.dateFOA2020-02-13T03:11:12Z


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