Laryngeal nerve

The Laryngeal nerve, or Galen's nerve, is a nerve originating from the vagus nerve. It is comprised of two branches, the cranial, which leaves the vagus at the distal ganglion and passes ventrally to the larynx supplying the cricothyroid muscle and laryngeal mucosa, and the caudal, which enters the larynx under the caudal edge of the cricopharyngeaus muscle and innervates all of the muscles of the larynx except the cricothyroideus.

There are two subdivisions of the cranial laryngeal nerve. These are internal (sensory) and external (motor).