ASSOCIATIONS BETWEEN VIBRATORY PERCEPTION THRESHOLD, QUADRICEPS/HAMSTRINGS CO-ACTIVATION RATIO, AND CHANGES IN FEMORAL ARTICULAR CARTILAGE Public Deposited

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  • March 21, 2019
Creator
  • Guadagno, Emily
    • Affiliation: College of Arts and Sciences, Department of Exercise and Sport Science
Abstract
  • Introduction: The hallmark sign of knee osteoarthritis (OA) is cartilage damage. Patients with knee OA present impulse loading, co-activation of knee musculature, and somatosensory deficits have been. These characteristics could be precursors rather than disease outcomes. Purpose: to evaluate associations between vibratory sensation (VPT), quadriceps and hamstring co-activation, and percent change of cartilage cross-sectional area (CSA) in healthy population. Methods: VPT was measured, participants performed walking trial where co-activation was measured, and pre/post ultrasound cartilage images were collected. Pearson product (r) determined associations between VPT, co-activaiton indices, and change in CSA. Results: 31 participants (age=22(2.5)years, height=1.71(0.15)m weight=74.9(11.8)kg) completed this study. Significant associations between medial and composite co-activation index and change in CSA (r=0.031, p=0.009), between lateral malleolus VPT and co-activation indices laterally during PRE-phase of gait, and composite during LA (r=-0.443,p=0.014 and r=0.415, p=0.023) were found. Discussion: Greater co-activation during gait may be associated with changes in knee cartilage.
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Rights statement
  • In Copyright
Advisor
  • Blackburn, J.
  • Johnston, Chris
  • Wikstrom, Erik
Degree
  • Master of Arts
Degree granting institution
  • University of North Carolina at Chapel Hill Graduate School
Graduation year
  • 2018
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