Question

which of the following structures helps to stabilize the shoulder joint?

ulnar collateral ligament
acetabular labrum
glenoid labrum
acromioclavicular ligament

Explanation:

Identify the anatomical location of each option

• Ulnar Collateral Ligament: Elbow joint
• Acetabular Labrum: Hip joint
• Glenoid Labrum: Shoulder (glenohumeral) joint
• Acromioclavicular Ligament: Acromioclavicular joint (stabilizes clavicle and scapula, not the primary shoulder joint itself)

Determine the structure stabilizing the shoulder joint

• The glenohumeral (shoulder) joint is a ball-and-socket joint formed by the head of the humerus and the glenoid cavity of the scapula.
• The glenoid labrum is a fibrocartilaginous ring that deepens the glenoid cavity, directly stabilizing the glenohumeral joint.

Answer:

• Ulnar Collateral Ligament
• Acetabular Labrum
• Glenoid Labrum (Correct answer)
• Acromioclavicular Ligament