9. Subclavius

Origin: 1st rib at junction between rib and costal cartilage

Insertion: Groove on the inferior surface of middle 1/3 of clavicle

Action:

• Elevates 1st rib
• Depresses clavicle
• Pulls the clavicle medially to stabilize the sternoclavicular joint

Innervation: nerve to subclavius (C5/6)

Needling

Position: Supine

Palpation: Palpate along the inferior ridge of the middle 1/3 of the clavicle

Technique: Standing at the head of the patient, make a bracket of your fingers on the inferior ridge of the clavicle – Needle between your fingers in an inferior-to-superior direction using the clavicle as a bony backdrop

Caution: High – lung field is below this muscle – Ensure that you are not needling under the clavicle – Your needle should almost immediately hit the clavicle; if not, withdraw your needle