Distribution of the trigeminal nerve (cranial nerve V)

The orientation drawing shows the trigeminal ganglion and its sensory and motor roots in situ.
(A) Lateral view showing distribution of the three divisions of the trigeminal nerve (CN V1, the ophthalmic nerve; CN V2, the maxillary nerve; and CN V3, the mandibular nerve) to the skin of the face and scalp. All three divisions are sensory.
(B) Lateral view. Each division supplies the skin and subcutaneous tissue and sends a branch to the dura mater. Each division provides sensory fibers that pass through an autonomic ganglion and delivers the postsynaptic parasympathetic fibers from that ganglion: CN V1 for the ciliary ganglion, CN V2 for the pterygopalatine ganglion, and CN V3 for the submandibular and otic ganglia. CN V3 is also motor to four pairs of muscles: temporal, masseter, and the two pterygoid muscles.
(C) "Open book" illustration of the innervation of the anterior wall of the nasal cavity. Passing from the pterygopalatine ganglion, the nasopalatine nerve passes through the sphenopalatine foramen; the greater and lesser palatine nerves pass through the canals of the same name, and the pharyngeal nerve passes through the pharyngeal canal.