The brachialis acts to flex the elbow whether in pronation or supination, along with Biceps brachi. As Brachialis is attached to the Ulna, which cannot rotate, it is the only true flexor of the elbow.

 Origin

  • Lower half of the anterior humerus

Insertion

  • Coronoid process of the ulna

Actions

  • Flexion of the elbow

Innervation

  • Musculocutaneous nerve

Daily uses

  • Picking up shopping bags

How can I stretch it?

How can I strengthen it?

Elbow Joint Muscles:

Related Articles

Biceps Brachii

The Biceps brachii crosses both the elbow and shoulder joints. It is a weak flexor of the shoulder joint but is a strong flexor the elbow joint, especially when the forearm is supinated (palm facing...

Triceps Brachii

The Triceps Brachii also assists Latissimus Dorsi in extending the shoulder joint. It contracts strongly during the up phase of a push-up, to straighten the arm.

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.

Supinator

The supinator muscle assists Biceps brachii in supinating the hand, that is turning it over so that the palm faces up. To isolate the supinator muscle, supinate the hand whilst extending the elbow...

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