Brachioradialis muscle
Brachioradialis muscle |
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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.