Innervation of the musculature derived from the five pharyngeal arches that do develop is as follows: first arch—trigeminal nerve [V3], second arch—facial nerve [VII], third arch—glossopharyngeal nerve [IX], fourth arch—superior laryngeal branch of the vagus nerve [X], sixth arch—recurrent laryngeal branch of the vagus nerve [X], posterior arches—accessory nerve [XI].