Brachioradialis

The brachioradialis (Latin: musculus brachioradialis) is a fusiform-shaped superficial muscle of the upper limb that stretches between the humerus and radius. It belongs to the lateral compartment of the forearm muscles. Although the brachioradialis is located in the lateral compartment together with two extensors - extensor carpi radialis longus and brevis - it is one of the forearm flexors.

Origin

The brachioradialis muscle originates from the lateral supracondylar ridge of the humerus and lateral intermuscular septum of the arm.

Insertion

The brachioradialis descends and inserts superior to the styloid process of the radius.

Action

The brachioradialis muscle provides the flexion of the forearm at the elbow joint. Also, it is responsible for keeping the forearm in the intermediate position between the supination and pronation of the forearm.

Innervation

The brachioradialis is innervated by the radial nerve (C5, C6) - a branch of the brachial plexus.

Blood supply

The brachioradialis muscle receives arterial blood supply from the radial recurrent branch of the radial artery and radial collateral artery of the deep brachial artery.