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Quiz Question of the Week: Superior Glenohumeral Ligament

anatomy glenohumeral joint glenohumeral ligament shoulder
Glenohumeral Joint, Gray Anatomy, Shoulder, Anatomy

The superior glenohumeral ligament is under the greatest stress when the humeral head and arm are in which of the following positions:

a. Anteriorly translated with the arm in 90 degrees of abduction and externally rotated.

b. Inferiorly translated with the arm at the side of the body.

c. Anteriorly translated with the arm in 90 degrees of abduction and internally rotated. 

d. Inferiorly translated with the arm in 90 degrees of abduction. 

e. Inferiorly translated with the arm in 45 degrees of abduction 

 

Answer: b. Inferiorly translated with the arm at the side of the body.

These studies have demonstrated that the superior glenohumeral ligament provides the most restraint to the shoulder joint when the arm is at zero degrees of abduction or in adduction and pulled inferiorly. Warner et al. found that the superior glenohumeral ligament provided the most restraint when the arm was at zero degrees of abduction and pulled inferiorly.

 

Warner JJ, Deng XH, Warren RF, Torzilli PA. Static capsuloligamentous restraints to superior-inferior translation of the glenohumeral joint. Am J Sports Med. 1992;20(6):675-685. doi:10.1177/036354659202000608

 

Wilk KE, Arrigo CA, Andrews JR. Current concepts: the stabilizing structures of the glenohumeral joint. J Orthop Sports Phys Ther. 1997;25(6):364-379. doi:10.2519/jospt.1997.25.6.364

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