Origin Long Head
Infraglenoid tubercle of scapula
Origin Lateral Head
Above the radial groove
Origin Medial Head
Below the radial groove
Insertion
Olecranon process of ulna
Actions
- Extension of elbow
- Long head: Adduction and extension of the arm at the shoulder joint
Innervation
- Radial nerve (C6, C7, C8)
Blood Supply
- Deep brachial artery
- Long head: posterior circumflex humeral artery
Would you like to learn more about the triceps brachii muscle? Then check out the triceps brachii muscle article and video by clicking the link below: Triceps Brachii Muscle Anatomy
