Question

multiple choice question

the glenohumeral joint is where the ______ of the scapula meets the humerus.

coracoid process
glenoid cavity
spine
acromion

Explanation:

Analyze the anatomical terms

The question asks for the specific part of the scapula that meets the humerus to form the glenohumeral joint. The name of the joint itself, "glenohumeral," provides a direct linguistic clue: "gleno-" refers to the glenoid cavity, and "-humeral" refers to the humerus.

Evaluate the options

Using our understanding of Joint Articulation, we can evaluate each anatomical structure of the scapula:

• coracoid process: A hook-like structure on the lateral edge of the superior anterior portion of the scapula. It serves as an attachment point for muscles and ligaments, not for articulation with the humerus.
• glenoid cavity: A shallow depression on the lateral angle of the scapula that articulates with the head of the humerus to form the shoulder joint.
• spine: A prominent plate of bone crossing obliquely the medial four-fifths of the scapula at its upper part, separating the supraspinous and infraspinous fossae.
• acromion: A bony prominence at the top of the shoulder that is the continuation of the scapular spine, articulating with the clavicle.

Confirm the correct match

The head of the humerus fits directly into the glenoid cavity of the scapula, forming the glenohumeral (shoulder) joint. Therefore, the correct option is the glenoid cavity.

Answer:

• coracoid process
• glenoid cavity (Correct answer)
• spine
• acromion