Posterior view of the bones of the upper limb showing muscle attachments.

Dorsal scapular region. Quadrangular space and triangular interval.

Anterior view of the bones of the upper limb showing muscle attachments.

Lateral view of the surface anatomy of the arm, showing the brachialis, biceps brachii, deltoid, brachioradialis, extensor carpi radialis longus, triceps brachii, lateral epicondyle, olecranon, and fascia covering anconeus and common extensor tendon.

A, Subacromial bursa and its relationship to the acromion, deltoid muscle and the tendon of the supraspinatus muscle. Coronal section; anterior view. B, Attrition of supraspinatus tendon and underlying joint capsule leads to communication between should j

Posterior view of the surface anatomy of the triceps brachii: (1) deltoid, (2) infraspinatus, (3) medial head, (4) lateral head, (5) olecranon, (6) long head of triceps brachii, (TM) teres major, (R) rhomboids, (LD) latissimus dorsi.

Transverse MRI of arm at mid humerus: BB, biceps brachii; BV, brachial vessels/nerves; MT, medial head of triceps; BC, brachialis; T, deltoid tuberosity; H, humerus; D, deltoid; LAT, lateral head triceps; LT, long head triceps; LI, lateral intermuscular s

Superficial muscles of the back.

Lateral view of the upper arm showing the biceps and triceps muscles and their skeletal attachments.

Muscles of the arm and related structures.

Triceps muscle