The contribution of the glenohumeral ligaments to anterior stability of the shoulder joint

P. W. O'Connell*, G. W. Nuber, R. A. Mileski, E. Lautenschlager

*Corresponding author for this work

Research output: Contribution to journalArticle

177 Scopus citations

Abstract

The purpose of this study was to investigate the ligamentous stabilizing mechanisms preventing anterior instability in the glenohumeral joint. Six freshly thawed, unembalmed cadaveric shoulders were dissected, preserving the joint capsule and glenohumeral ligaments, the coracohumeral ligament, and the subscapularis tendon. Hall-effect strain transducers were placed on the superior, middle, and inferior glenohumeral ligaments. The humerus and scapula were fixed in a specifically designed mounting apparatus that allowed the glenohumeral joint to be placed in 0°, 45°, or 90° of abduction. The mounting apparatus was placed in a model TTC Instron Universal Testing Instrument, which applied an external rotation torque to the humerus. Strain produced in the three glenohumeral ligaments was recorded on a three-channel X-Y chart recorder. At 0° of abduction, the superior and middle glenohumeral ligaments developed the most strain. At 45° of abduction, the inferior and middle glenohumeral ligaments developed the most strain, with considerable strain also being developed in the superior glenohumeral ligament. At 90° of abduction, the inferior glenohumeral ligament developed the most strain, with strain also seen in the middle glenohumeral ligament.

Original languageEnglish (US)
Pages (from-to)579-584
Number of pages6
JournalAmerican Journal of Sports Medicine
Volume18
Issue number6
DOIs
StatePublished - Jan 1 1990

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine
  • Physical Therapy, Sports Therapy and Rehabilitation

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