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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
