6. Brachialis

Origin: Inferior 1/2 of anterior humerus

Insertion: Coronoid process and tuberosity of the ulna

Action: Flexes the elbow

Innervation: Musculocutaneous nerve (C5/6/7) and radial nerve (C7)

Needling

Position: Supine, forearm supinated

Palpation: Push the biceps medially on the lower 1/2 of the humerus and your fingers will be on brachialis

Technique: Push the biceps medial to expose the brachialis and make a bracket of your fingers on top of brachialis – Needle perpendicular to this muscle using the humerus as a bony backdrop

Caution: Moderate

Median nerve and brachial artery lie deep to biceps brachii and on top of brachialis along the medial aspect of the humerus

Radial nerve lies between brachialis and triceps laterally