TRICEPS BRACHII

• Origin

Long head - infraglenoid tubercle of scapula

Lateral head - posterior shaft of humerus

Medial head -  posterior shaft of humerus

• Insertion

Olecranon process of ulna

• Agonist(s)

- Deltoids

- Pectoralis major

- Latissimus dorsi

• Antagonist(s)

- Biceps Brachii

- Brachialis

• Function

Extends elbow joint, adducts and extends arm at shoulder joint