Which anatomical structure is the raised area on the lateral surface of the humerus where the deltoid muscle attaches?

• A. Deltoid tuberosity
• B. Greater tubercle
• C. Olecranon process
• D. Medial epicondyle

Answer: (A)

Verified step by step guidance

1. Identify the anatomical location of the humerus, which is the long bone in the upper arm extending from the shoulder to the elbow.
2. Understand the function of the deltoid muscle, which is responsible for lifting the arm and providing shoulder movement. It attaches to a specific raised area on the humerus.
3. Review the anatomical landmarks of the humerus: the deltoid tuberosity is a roughened, raised area on the lateral surface of the humerus where the deltoid muscle attaches.
4. Compare the other options: the greater tubercle is a projection near the head of the humerus for rotator cuff muscle attachment, the olecranon process is part of the ulna (not the humerus), and the medial epicondyle is a bony prominence on the distal end of the humerus for forearm muscle attachment.
5. Conclude that the correct anatomical structure where the deltoid muscle attaches is the deltoid tuberosity, based on its location and function.