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Multiple Choice
Which is the most mobile of the primary joints forming the shoulder girdle?
A
Glenohumeral joint
B
Sternoclavicular joint
C
Scapulothoracic joint
D
Acromioclavicular joint
Verified step by step guidance
1
Understand the anatomy of the shoulder girdle, which consists of several joints that connect the upper limb to the trunk.
Identify the primary joints forming the shoulder girdle: the glenohumeral joint, sternoclavicular joint, scapulothoracic joint, and acromioclavicular joint.
Consider the function and range of motion of each joint. The glenohumeral joint is a ball-and-socket joint, allowing for a wide range of movements such as flexion, extension, abduction, adduction, rotation, and circumduction.
Compare the mobility of the glenohumeral joint with the other joints. The sternoclavicular joint, acromioclavicular joint, and scapulothoracic joint have more limited ranges of motion.
Conclude that the glenohumeral joint is the most mobile joint in the shoulder girdle due to its ball-and-socket structure, which provides extensive movement capabilities.