The brachial plexus: C-5 |  C-6 |  C-7 | the transverse cervical artery is a branch from the subclavian artery |  subclavian artery continues here |   median nerve |   medial cord |   ulnar nerve | the posterior (top) and anterior circumflex humeral arteries form an anastomosis around the head of the humerus |  musculocutaneous nerve |