Sagittal section showing olecranon bursa, triceps brachii, trochlea of humerus, brachialis, fibrous capsule, fatpad, synovial membrane, and coronoid process of ulna.

Posterior view of the muscles of the right arm (triceps brachii muscle, interosseus muscles and the superficial extensor muscles of the forearm).

Posterior isolated view of the triceps muscle showing skeletal attachments.

Surface anatomy of axilla and anterolateral aspect of trunk.

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

Posterior aspect of the elbow, with distal portion of triceps brachii muscle removed and anconeus retracted.

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.

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.

Lateral view of the glenoid cavity.

Superficial muscles of the back.

Triceps brachii and its three related nerves.

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

Triceps brachii muscle