Lacrimal nerve
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| Nerve: Lacrimal nerve | ||
|---|---|---|
 | ||
| Dissection showing origins of right ocular muscles, and nerves entering by the superior orbital fissure. | ||
 | ||
| Nerves of the orbit, and the ciliary ganglion. Side view. | ||
| Latin | nervus lacrimalis | |
| Gray's | subject #200 887 | |
| Innervates | lacrimal gland | |
| From | ophthalmic nerve | |
| To | ||
| MeSH | [1] | |
The lacrimal nerve is the smallest of the three branches of the ophthalmic.
It sometimes receives a filament from the trochlear nerve, but this is possibly derived from the branch which goes from the ophthalmic to the trochlear nerve.
It passes forward in a separate tube of dura mater, and enters the orbit through the narrowest part of the superior orbital fissure.
In the orbit it runs along the upper border of the lateral rectus, with the lacrimal artery, and communicates with the zygomatic branch of the maxillary nerve.
It enters the lacrimal gland and gives off several filaments, which supply the gland and the conjunctiva.
Finally it pierces the orbital septum, and ends in the skin of the upper eyelid, joining with filaments of the facial nerve.
The lacrimal nerve is occasionally absent, and its place is then taken by the zygomaticotemporal branch of the maxillary nerve. Sometimes the latter branch is absent, and a continuation of the lacrimal nerve is substituted for it.
[edit] Functions
Its superior branch provides innervations for the lacrimal gland, conjunctiva, skin of the lateral angle of the mouth, and the lateral upper eyelids.
[edit] Additional images
 Nerves of the orbit. Seen from above. |
 Distribution of the maxillary and mandibular nerves, and the submaxillary ganglion. |
 Sensory areas of the head, showing the general distribution of the three divisions of the fifth nerve. |
 The tarsi and their ligaments. Right eye; front view. |
[edit] External links
- SUNY Labs 29:16-0102 - "Orbits and Eye: The Lacrimal Gland"
- Atlas of anatomy at UMich n2a4p2 - "Branches of Trigeminal Nerve, Lateral View"
- MedEd at Loyola GrossAnatomy/h_n/cn/cn1/cnb1.htm
- Norman/Georgetown cranialnerves (VII)
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 As such, some of the information contained herein may be outdated.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.
I-IV: olfactory - optic - oculomotor - trochlear
V: trigeminal: trigeminal ganglion
V1: ophthalmic: lacrimal - frontal (supratrochlear, supraorbital) - nasociliary (long root of ciliary, long ciliary, infratrochlear, posterior ethmoidal, anterior ethmoidal) - ciliary ganglion (short ciliary)
V2: maxillary: middle meningeal - in the pterygopalatine fossa (zygomatic, zygomaticotemporal, zygomaticofacial, sphenopalatine, posterior superior alveolar)
in the infraorbital canal/infraorbital nerve (middle superior alveolar, anterior superior alveolar)
on the face (inferior palpebral, external nasal, superior labial, infraorbital plexus) - pterygopalatine ganglion (deep petrosal, nerve of pterygoid canal)
branches of distribution (palatine, nasopalatine, pharyngeal)
V3: mandibular: nervus spinosus - medial pterygoid - anterior (masseteric, deep temporal, buccal, lateral pterygoid)
posterior (auriculotemporal, lingual, inferior alveolar, mylohyoid, mental) - otic ganglion - submandibular ganglion
VI: abducens
VII: facial: nervus intermedius - geniculate - inside facial canal (greater petrosal, nerve to the stapedius, chorda tympani)
at exit from stylomastoid foramen (posterior auricular, digastric - stylohyoid)
on face (temporal, zygomatic, buccal, mandibular, cervical)
VIII: vestibulocochlear: cochlear (striae medullares, lateral lemniscus) - vestibular
IX: glossopharyngeal: fasciculus solitarius - nucleus ambiguus - ganglia (superior, petrous) - tympanic - carotid sinus
X: vagus: ganglia (jugular, nodose) - Alderman's nerve - in the neck (pharyngeal branch, superior laryngeal ext and int, recurrent laryngeal)
in the thorax (pulmonary branches, esophageal plexus) - in the abdomen (gastric plexuses, celiac plexus, gastric plexus)
XI: accessory XII: hypoglossal
| This page uses content from the English-language version of Wikipedia. The original article was at Lacrimal nerve. The list of authors can be seen in the page history. As with Psychology Wiki, the text of Wikipedia is available under the GNU Free Documentation License. |
