The upper arm is called the brachium. More specifically, the long bone of the upper arm is called the humerus. This bone extends from the shoulder and scapula (shoulder blade) to the elbow. [1, 2, 8, 9] The humerus is the longest bone in your body, excluding the bones in your legs. [1, 2] It's crucial for arm movement and supports many muscles, tendons, ligaments, and circulatory system components. [1, 2] The muscles of the upper arm, such as the biceps brachii, coracobrachialis, and brachialis, are located in the anterior compartment of the brachium. [7] Other muscles, like the pectoralis major, latissimus dorsi, deltoid, and rotator cuff muscles, connect to the humerus and help move the arm. [6]
Understanding the Upper Limb
The upper arm is part of the upper limb, which extends from the shoulder and clavicle down to the wrist. [5] The forearm, the section of the upper limb from the elbow to the wrist, consists of the radius and ulna bones. [3] Therefore, while the brachium specifically refers to the upper arm itself, understanding the upper limb provides a broader anatomical context.
In summary: The upper arm is referred to as the brachium, and its primary bone is the humerus.
