Comparison of model-predicted and measured moment arms for the rotator cuff muscles.
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.


CONCLUSIONS
The quantitative agreement between model-predicted and experimentally measured moment arms supports the use of the included models for biomechanical shoulder analyses.
Gatti
Christopher J
CJ
Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, United States.
Dickerson
Clark R
CR
Chadwick
Edward K
EK
Mell
Amy G
AG
Hughes
Richard E
RE
D001132:Arm / Q000502:physiology; D019295:Computational Biology; D006801:Humans; D017006:Rotator Cuff / Q000502:physiology*