Skip to content

Elizabeth Contreras

Abstract

Bio, Research, Abstract

Top Navigation

Main Navigation

  • EWU Home
  • Academics at Eastern
  • Ronald E. McNair Post Baccalaureate Achievement Program
  • Past and Present Participants
  • 2006 Research Interns
  • Elizabeth Contreras
  • Main Content

    2006 Research

    Abstract: Relationship Between Quadriceps Muscle Weakness and Relative Disuse in Patients with Knee Osteoarthritis: Pilot Data

    Mentor: Dr. Ryan Mizner, Physical Therapy


    Osteoarthritis(OA) is the number one source of disability among elderly persons. Frequently developing in the knee, OA often creates mobility restrictions contributing to a decrease in daily physical activity and muscular stress of the lower extremity. The natural adaptation of reduced muscular stress is disuse atrophy. We hypothesize that inactivity coupled with reduction in muscle recruitment during walking contributes to quadriceps weakness. Patients with OA will have weaker quadriceps muscles, lower daily step frequency, and lower quadriceps muscle recruitment when they walk. Testing included an isometric quadriceps muscle strength assessment, threedimensional gait analysis in conjuction with electromyography of the quadriceps muscle. Subjects also wore ankle stepcounter that tracked the number and frequency of steps. Three participants have completed testing: one TKA and two healthy participants. The person with OA was much weaker and was waking half as much as the healthy chohort. The OA subject also had lower average quadriceps muscle
    recruitment during gait. Thus far, our hypotheses are supported by our results, but more participants are needed to make meaningful conclusions.

    Presentations

    Annual Biomedical Research Conference for Minority Students Anaheim, CA, Nov 8-11, 2006

    10th Annual Research & CW Symposium, EWU, May 16,2007

    16th Annual McNair Conference and Graduate Fair, WI, Nov. 2007

    11th Annual Research & CW Symposium, EWU, May 14, 2008

    Contact Information

    Eastern Washington University
    526 5th Street
    Cheney, WA 99004

    phone: 509.359.6200 (campus operator)

    Footer Navigation


    Text Only Options

    View the original version of this page.