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Brachialis
Origin: Lower half of anterior Shaft of humerus
Insertion: Tuberosity and coronoid process of ulna
Action: Flexion of elbow
Nerve: Musculocutaneous Nerve (Cervical 5, 6, 7) (sometimes branches from radial and median nerves)
Palpate: Palpate muscle belly medial to biceps on lower anterior humerus during active elbow flexion. Relax biceps by pronating forearm. Palpate tendon deep in antecubital fossa just medial to biceps tendon.
This muscle is the strongest elbow flexor.