• Login
    View Item 
    •   Athenaeum Home
    • University of Georgia Theses and Dissertations
    • University of Georgia Theses and Dissertations
    • View Item
    •   Athenaeum Home
    • University of Georgia Theses and Dissertations
    • University of Georgia Theses and Dissertations
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Effect of lower leg eccentric actions on the nociceptive flexion (R-III) reflex, foot tremor, and delayed onset muscle pain

    Thumbnail
    Date
    2007-08
    Author
    Pasley, Jeffrey Dean
    Metadata
    Show full item record
    Abstract
    The primary purpose of this investigation was to learn whether the R-III reflex threshold, a measure of nociception that can be safely obtained from human subjects, is altered after completing lower leg eccentric exercise that causes delayed onset muscle pain. It was hypothesized that the R-III reflex threshold would decrease in the injured leg of the exercise group after eccentric exercise compared to the uninjured leg of the control group. Measures of inflammation (leg volume), pain and physiological tremor, a neurological measure not directly involved in nociception but known to be increased following eccentric exercise, were included to document that the stimulus used here induced the expected muscle injury, pain and change in non-nociceptive neurology. Initial investigations (n = 30 to 31 adults tested) examined the day-to-day reliability of lower leg volume and active foot tremor at 90 and found both to be highly reliable (ICC 3,5 = .972 and .821, respectively). In the primary experiment, 22 young adult females were block randomized to either an eccentric exercise group (n=11) or a no exercise control group (n=11). Before and after the exercise or control condition (10 min, 24-, 48- and 72-hrs post) measurements were made of the R-III reflex threshold, physiologic foot tremor, leg volume and muscle pain. From 24 to 72 hours following eccentric exercise, small increases in leg volume, pain intensity and pain affect were found as was a small decrease in foot tremor and R-III reflex threshold. Repeated measures ANOVA revealed that the range of oscillation in the minimum and maximum R-III threshold 24 to 72 hours after eccentric exercise was significantly greater than in the control condition (F1,20 = 9.91; p = 0.005; n2 = 0.33; e = 1.00). It is concluded that eccentric exercise inducing modest changes in indicators of muscle injury increases the range of oscillation in the R-III reflex threshold 24 to 72 hours after the exercise.
    URI
    http://purl.galileo.usg.edu/uga_etd/pasley_jeffrey_d_200708_phd
    http://hdl.handle.net/10724/24249
    Collections
    • University of Georgia Theses and Dissertations

    About Athenaeum | Contact Us | Send Feedback
     

     

    Browse

    All of AthenaeumCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    LoginRegister

    About Athenaeum | Contact Us | Send Feedback