Latissimus dorsi inserts on which structure?

• A. Deltoid tuberosity
• B. Intertubercular groove of the humerus
• C. Olecranon
• D. Coracoid process

Answer: (B)

Latissimus dorsi inserts on the intertubercular groove of the humerus. This groove runs along the anterior proximal humerus and serves as the tendon path for several powerful shoulder muscles; the latissimus dorsi tendon specifically anchors there, situating the muscle to pull the humerus downward and toward the body. This positioning supports its actions of shoulder extension, adduction, and medial (internal) rotation.

The other sites mentioned aren’t correct for this muscle: the deltoid tuberosity is where the deltoid attaches, the olecranon is the elbow attachment for the triceps, and the coracoid process is a small projection on the scapula for muscles like the pec minor and short head of the biceps.