Lakehead University Library Logo
    • Login
    View Item 
    •   Knowledge Commons
    • Electronic Theses and Dissertations
    • Retrospective theses
    • View Item
    •   Knowledge Commons
    • Electronic Theses and Dissertations
    • Retrospective theses
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.
    quick search

    Browse

    All of Knowledge CommonsCommunities & CollectionsBy Issue DateAuthorTitleSubjectDisciplineAdvisorCommittee MemberThis CollectionBy Issue DateAuthorTitleSubjectDisciplineAdvisorCommittee Member

    My Account

    Login

    Statistics

    View Usage Statistics

    Hamstrings contractile timing in anterior cruciate deficient subjects

    Thumbnail

    View/Open

    PolingM1999m-1b.pdf (2.066Mb)

    Date

    1999

    Author

    Poling, Michael Peter

    Degree

    Master of Science

    Discipline

    Kinesiology

    Subject

    Hamstring muscle Contraction
    Knee Mechanical properties
    Anterior cruciate ligament

    Metadata

    Show full item record

    Abstract

    Anterior cruciate injuries are extremely debilitating injuries for active individuals. It is estimated that 60 to 70% of all serious knee injuries involve damage to the anterior cruciate ligament (ACL) (Brant. 1989). One of the functional roles of the hamstrings is to prevent the anterior translation of the tibia, absorbing a portion of the anterior shear forces on the ACL (Brant. 1989; Nordin & Frankel, 1989). Timing of the hamstrings contraction during gait provides an important counter force to stabilize the knee. However, if the force occurs too early or too late, stabilization is compromised. Electromyographical (EMG) research analyses demonstrates that the hamstrings increase in actuation just before heelstrike (GaufBn & Tropp, 1992; Gronley & Perry, 1984; Phyllis, 1993; Johnstone, 1993). This response may be due to training of the muscle to respond to spatial and temporal cues, causing a compensator) contraction of the hamstrings (Schm idt 1988; Vlagill, 1989).

    URI

    http://knowledgecommons.lakeheadu.ca/handle/2453/3123

    Collections

    • Retrospective theses

    Lakehead University Library
    Contact Us | Send Feedback

     


    Lakehead University Library
    Contact Us | Send Feedback