Brachioradialis muscle
| Brachioradialis muscle |
|---|
|
| origin |
| Outer border of the humerus ( lateral supracondylar crest ) |
| approach |
| Radius ( processus styloideus radii ) |
| function |
| Supination and flexion of the forearm |
| Innervation |
| Radial nerve of the brachial plexus |
| Spinal segments |
| C5, C6 |
The musculus brachioradialis ( Latin for "upper arm spoke muscle ") is one of the skeletal muscles of the forearm on the spoke or thumb side .
In the ungulates it is not trained; it is often absent in dogs .
The brachioradialis muscle is involved in the flexion of the elbow joint and rotates the ulna and radius against each other so that the thumb comes outward ( supination ). Due to its long lever arm, it is the typical load flexor of the elbow joint , especially with a pronated forearm.
The muscle is innervated by the radial nerve.