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Brachioradialis

Other Terms: Musculus brachioradialis, Muscle brachio-radial

Muscle parts

None

Latin name

Musculus brachioradialis

Latin muscle parts

None

Group

Antebrachial muscle – posterior compartment – lateral group

Etymology

In English, this muscle’s name is the muscle of the arm that is along the radius. Brachialis derives from the Latin term brachium, which derives from the Greek brachion meaning “arm,” in reference to the region of the upper limb between the shoulder and the elbow. The term radialis in the name refers to the fact that the muscle follow the radius bone. The Latin term radius meaning “rod, ray, or spoke” was applied to this bone because of its resemblance to a rod or the spoke of a wheel.

Origin

Lateral supracondylar ridge of the humerus

Insertion

Styloid process of the radius

Action

Flexes the elbow joint – the muscle has the best mechanical advantage at the elbow joint when the forearm is semiprone; it is only slightly activated during flexion of the supine forearm. The muscle stabilizes the elbow joint during rapid elbow movements of either flexion or extension.

Nerve supply

Radial nerve (C5, C6, and C7)

Blood supply

From proximal to distal, the muscle receives a blood supply from the radial collateral branch of the brachial profunda artery; the radial recurrent artery, small muscular branches from the radial artery.

Latin

Musculus brachioradialis

French

Muscle brachio-radial

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