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Comparison of model-predicted and measured moment arms for the rotator cuff muscles
Christopher J Gatti1, Clark R Dickerson, Edward K Chadwick
1Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, United States.
Background:
The ability of mathematical models of the shoulder to accurately replicate physiological muscle moment arms is unknown. The purpose of this study was to compare model-predicted and experimentally measured moment arms for the rotator cuff muscles during arm elevation.
Methods:
Moment arms obtained from six mathematical models and seven experimental studies were compared for the supraspinatus, infraspinatus, teres minor, and subscapularis for elevation in the scapular plane.
Results:
All of the included models generated moment arms that generally fell within the range of experimentally measured data.
Interpretation:
The quantitative agreement between model-predicted and experimentally measured moment arms supports the use of the included models for biomechanical shoulder analyses.
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