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Brachialis

Other Terms: Casserio's muscle, Musculus brachialis, Muscle brachial

Muscle parts

None

Latin name

Musculus brachialis

Latin muscle parts

None

Group

Brachial muscle – anterior compartment

Etymology

In English, the muscle’s name is the muscle of the arm. 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.

Origin

Anterior surface of distal half of the humerus

Insertion

Coronoid process of the ulna and ulnar tuberosity

Action

Flexion of the elbow joint – the brachialis is the major flexor of the elbow joint when the forearm is either supinated or pronated. It is active during all movements of elbow flexion, both resisted and not.

Nerve supply

Musculocutaneous nerve (C5 and C6)

Blood supply

Muscular branches of the brachial artery supply the major bulk of the muscle. It also receives branches from the ulnar, superior ulnar collateral, inferior ulnar collateral, anterior ulnar recurrent, radial collateral, and radial recurrent arteries.

Latin

Musculus brachialis

French

Muscle brachial

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