External nasal nerve

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Nerve: External nasal nerve
File:Raminasalesexterninerviinfraorbitalis.PNG
Sensory areas of the head, showing the general distribution of the three divisions of the fifth nerve. (Nasal nerve labeled at center left.)

The sphenopalatine ganglion and its branches.
Latin	rami nasales externi nervi infraorbitalis
Gray's	subject #200 891
Innervates	nose
From	maxillary nerve (infraorbital nerve)
Dorlands / Elsevier	r_02/12691092

The external nasal branches (or external nasal nerve) are terminal branches of the anterior ethmoidal nerves (from the ophthalmic division of the trigeminal nerve, CN V), and provide sensory innervation to the skin of the side of the nose and of the septum mobile nasi.

Additional images

Distribution of the maxillary and mandibular nerves, and the submaxillary ganglion.

External links

SUNY Labs 29:08-0100

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.

v • d • e

The cranial nerves: trigeminal nerve

ophthalmic (V1)

frontal: supratrochlear - supraorbital (lateral branch, medial branch)

nasociliary: long ciliary - infratrochlear - posterior ethmoidal - anterior ethmoidal (external nasal, internal nasal) - sensory root of ciliary ganglion (ciliary ganglion)

lacrimal

maxillary (V2)

in meninges	middle meningeal
in pterygopalatine fossa	zygomatic (zygomaticotemporal, zygomaticofacial) - pterygopalatine (pterygopalatine ganglion see below for details) - posterior superior alveolar
in infraorbital canal	infraorbital nerve: superior alveolar (middle, anterior) - internal nasal branches
on face	inferior palpebral - external nasal - superior labial (infraorbital plexus)

mandibular (V3)

in meninges	meningeal
anterior	to muscles of mastication (medial pterygoid/to tensor veli palatini, lateral pterygoid, masseteric, deep temporal) - buccal
posterior	auriculotemporal (otic ganglion) - lingual (submandibular ganglion) - inferior alveolar (mylohyoid, mental)