The relationship between humeral rotation and scapular tipping Public Deposited

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  • March 21, 2019
Creator
  • Conner, Laura
    • Affiliation: College of Arts and Sciences, Department of Exercise and Sport Science
Abstract
  • The relationship Between Humeral Rotation and Scapular Tipping. (Under the direction of Darin A. Padua, PhD, ATC) Background: Decreased shoulder range of motion as well as aberrant scapular mechanics are suggested as risk factors for shoulder pain. Minimal data describing scapular motion during humeral rotation exists even though it is evaluated clinically. The purpose of this study was to determine the relationship between humeral rotation and scapular tipping. Twenty-five participants were studied. A universal goniometer was used to assess shoulder range of motion. Three-dimensional motion tracking was used to assess scapular kinematics. Statistically significant negative relationships were found between shoulder internal rotation ROM and scapular tipping at maximum humeral IR range during passive rotation task (r = -0.418, p = 0.033), as well as, scapular tipping ROM at 90? of humeral flexion angle (r = -0.367, p = 0.055) during a functional diagonal task. The total arc of shoulder rotation ROM was also negatively related to both scapular tipping ROM at 90? of humeral flexion angle (r = -0.397, p = 0.041) and scapular tipping ROM at maximal humeral flexion angle during functional diagonal task (r = -0.477, p = 0.017). The posterior shoulder flexibility measure was positively related to scapular tipping ROM at 90? of humeral flexion angle (r = 0.414, p = 0.035) and scapular tipping ROM at maximal humeral flexion angle during functional diagonal task (r = .384, p = 0.048). This study is the first to assess the relationship between clinical measures of shoulder ROM and scapular tipping ROM during functional tasks. Decreased shoulder ROM was related to increased scapular tipping ROM. Both decreased shoulder ROM and increased scapular tipping during shoulder rotation has been associated with shoulder pain.
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  • In Copyright
Advisor
  • Padua, Darin A.
Degree granting institution
  • University of North Carolina at Chapel Hill
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  • Open access
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