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What structure provides dynamic glenohumeral stability by compressing the humeral head against the glenoid?
Superior glenohumeral ligament
Middle glenohumeral ligament
Teres major muscle
Rotator cuff muscles
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A 67-year-old female who sustained a proximal humerus fracture as a result of a fall goes on to develop avascular necrosis (AVN). An injury was most likely sustained to which of the following arteries labeled 1-5 in Figure A?
Artery labeled 1
Artery labeled 2
Artery labeled 3
Artery labeled 4
Artery labeled 5
What is the primary function of the structure labeled with an asterisk in Figure A?
Prevents inferior translation of the humerus with the arm by the side
Provides internal rotation of the humerus
Prevents anterior translation of the humerus with the arm in 45 degrees of abduction
Prevents anterior translation of the humerus with the arm in 90 degrees of abduction
Provides supination of the forearm and elbow flexion
The superior glenohumeral ligament is under the greatest stress when the humeral head and arm are in which of the following positions?
Anteriorly translated with the arm in 90 degrees of abduction and externally rotated
Inferiorly translated with the arm in 5 degrees of adduction
Anteriorly translated with the arm in 90 degrees of abduction and internally rotated
Inferiorly translated with the arm in 45 degrees of abduction and internal rotation
Inferiorly translated with the arm in 90 degrees of abduction and neutral rotation
Besides the biceps tendon, which of the following structures also pass through the rotator interval?
The coracohumeral ligament only
The coracohumeral and superior glenohumeral ligaments
The coracohumeral, superior and middle glenohumeral ligaments
The superior and middle glenohumeral ligaments
The superior glenohumeral ligament only
Which of the following is a primary restraint of anterior and posterior humeral translation at the position of a patient's right shoulder as shown in Figure A?
Inferior glenohumeral ligament (IGHL)
Middle glenohumeral ligament (MGHL)
Superior glenohumeral ligament (SGHL)
Coracohumeral ligament (CHL)
Coracoacromial ligament (CA)
Which of the following is considered the primary static restraint to anterior gleno-humeral translation with the arm in 90 degrees of abduction?
Shape of the bony articulation
Negative intra-articular pressure
Superior gleno-humeral ligament complex
Middle gleno-humeral ligament complex
Inferior gleno-humeral ligament complex
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