Muscle
Brachialis
Workhorse elbow flexor
High-yield
Prime elbow flexor regardless of forearm position; dual innervation (musculocutaneous + a twig from radial nerve).
Overview
The main flexor of the elbow in all positions, lying deep to biceps and inserting on the ulna so its action is independent of forearm rotation.
Reference facts
- Origin
Distal half of the anterior surface of the humerus
- Insertion
Coronoid process and tuberosity of the ulna
- Action
Flexes the forearm at the elbow in all positions
- Innervation
Musculocutaneous nerve (C5, C6); small contribution from the radial nerve (C7)
- Blood supply
Brachial and radial recurrent arteries