Lacrimal Nerve

The lacrimal nerve is the smallest of the three branches of the ophthalmic division of the trigeminal nerve.

It sometimes receives a filament from the trochlear nerve, but this is possibly derived from the branch that 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 sensory innervation to the gland and the conjunctiva.

Then, 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.

Read more about Lacrimal NerveFunctions, Additional Images

Other articles related to "lacrimal nerve, nerves":

Lacrimal Nerve - Additional Images
... Nerves of the orbit ... 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 ...

Famous quotes containing the word nerve:

    Tom: All right, boys. C’mon. Why don’t you say I’m a yellow belly and a big mouth at that?
    Shep: You yellow? Who thinks you’re yellow? Did you hear what he said? A guy who’s got the nerve to marry? That’s more than Flash Gordon ever did.
    Billy Wilder (b. 1906)