Olecranon is the elbow's bony projection

• A. Olecranon
• B. Epicondyle
• C. Coronoid process
• D. Olecranon fossa

Answer: (A)

Recognizing elbow landmarks by their location and function helps distinguish them. The prominent bony projection at the back of the elbow is the olecranon. It is the upper end of the ulna, forming the visible bump you feel at the elbow’s tip. The olecranon serves as the attachment for the triceps muscle and, when the elbow extends, fits into the olecranon fossa of the humerus to allow smooth straightening of the arm. The other structures are different features: the epicondyle is a raised area on the humerus near the elbow where forearm muscles attach; the coronoid process is a forward projection of the ulna that engages with the coronoid fossa of the humerus during flexion; the olecranon fossa is a posterior depression on the humerus that accommodates the olecranon during extension. So, the elbow’s bony projection is the olecranon.