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Brachioradialis
The brachioradialis is a stronger elbow flexor when the forearm is in a mid position between supination and pronation at the radioulnar joint. When pronated, the brachioradialis is more active during elbow flexion since the biceps brachii is in a mechanical disadvantage.
Anatomy of the Brachioradialis
Other than the triceps, anconeus, and extensor carpi radialis longus, the brachioradialis is one of only four muscles that receive input directly from the radial nerve.
The brachioradialis originates from the lower 2/3 of the lateral supracondylar ridge of the humerus and is inserted into the styloid process of the radius bone.
Functions of the Brachioradialis
The Brachioradialis muscle acts to supinate the forearm from a pronated position, when it flexes the elbow. When starting in a supinated position, it acts to pronate the hand as it flexes the elbow.
You will normally use the muscle when turning a corkscrew.
The muscle can be strengthened by exercise that includes the biceps curls especially when using a resistance band.
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