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Brachialis: Origin, Insertion, Action

Brachialis Muscle Origin Insertion Action

Brachialis Anatomy

Origin:  Lower half of the anterior aspect of the humerus
Insertion:  Tuberosity and coronoid process of the ulna
Actions: Flexion of the forearm at the elbow
Innervation: Musculocutaneous nerve (C5, C6)
Blood Supply: Muscular branches from the brachial artery and the radial recurrent artery from the radial artery

For pain and symptom information visit: Brachialis Muscle Arm, Elbow and Thumb Pain

Primary Actions of the Brachialis

1. Flexion of the forearm at the elbow
  Agonists:

  • Biceps Brachii
  • Brachioradialis

  Antagonists:

  • Triceps Brachii
  • Anconeus

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