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Flashcards in Sensory Innervation Deck (33)
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what is the maxillary nerve formed by

infraorbital + zygomatic nerves, as well as nerves from the roof of the mouth, upper teeth and gums, mucous membranes of cheek--> through foramen rotundum


what does the posterior ethmoid nerve supply

-posterior ethmoid sinus
-sphenoid sinus
-frontoethmoid suture (to get into the orbit)


what is the trigeminal nerve pathway

1. ophthalmic + maxillary divisions run in the lateral wall of the cav sin
2. the mandibular division travels just below the cav sin
3. all three divisons enter the trigeminal ganglion
4. fibers enter the lateral pons as the sensory and motor roots of the trigeminal nerve
5. form ascending and descending tracts which terminate in the sensory nuclei of the trigeminal nerve


how does frontal nerve exit

through the sof above the ctr


where does the lacrimal nerve leave the orbit

through the sof and above the ctr


referred pain

tooth ache --> pain in the eye
-pain can spread + refer to other branches


short ciliary nerve pathway

1. travel in the suprachoroid to the posterior globe
2. exit the sclera with the psoterior ciliary arteries as 6-10 nerves in a ring around the optic nerve
3. pass through the ciliary ganglion (parasymp) as the sensory root of the ciliary ganglion
4. the sensory root of the ciliary ganglion joins the nasociliary nerve


herpes zoster

-virus hibernates in sensory nerves
-can affect side of face (unilateral)
-hutchinson sign


what does the nasociliary nerve supply

supplies globe itself


what is the pathway for the long ciliary nerves

1. fibers from the cornea come together in the area of the cb to form 2 long ciliary nerves, one on the lateral and one on the medial side of the globe
2. travel in the suprachoroidal space to the back of the eye (9clock + 3clock)
3. leaves the globe 3mm on either side of the optic nerve
4. joins the nasociliary nerve


supraorbital nerve innervates

forehead + upper eyelids (centrally)


what does the long ciliary nerves innervate

-always 2 sensory + sympathetic to the dilator
- anterior segment of the globe= anterior sclera, cornea, iris, ciliary body (tm)


mesencephalic nucleus

proprioception of EOM + face muscles


principle sensory nucleus

ascending gibers
- touch + pressure in the pons


where does the nasociliary nerve exit the orbit

through within the ctr and sof
-all 5 join
-all 5 leave orbit as nasociliary
-only branch of ophthalmic that goes thru ctr


what does the lacrimal nerve innervate

lateral upper eyelids, temporal area, sensory portion of lacrimal gland (sensory only)


infraorbital nerve innervates pathway

-infraorbital foramen --> inraorbital canal --> inferior orbital fissure


what are three branches of the trigeminal nerve and main things they supply

ophthalmic (around eye), maxillary (inferior orbit), mandibular (lower face + jaw)


what are the branches of the nasociliary nerve

-anterior ethmoid
-posterior ethmoid
-short ciliary
-long ciliary


short ciliary nerve innervates

anterior segment- cornea, iris, cb


what does the mandibular nerve innervate

lower face, does not pass through the cav sin --> helps localize lesion (pain @ forehead, cheek, cav sin)


nucleus of the spinal tract

descending fibers
pain + temp
pons + medulla


what does the frontal nerve travel between

the levator and periorbita


what does the anterior ethmoid nerve

-skin of medial nose
-nasal mucosa
-anterior middle of ethmoid sinus


hutchinson sign

-involves the tip of the nose
-likely spreads to the orbit area (nasociliary)
-can affect anterior segment + uveitis usually seen


vasovagal response

interacts with vagus nerve
-sensory- afferent into interaction with vagus nerve in brainstem


infraorbital nerve innervation

lower eyelids, cheek, upper lip, upper teeth


supratrochlear nerve innervates

forehead + upper eyelid (medially)


zygomatic exits through

inferior orbital fissure


what does the infratrochlear nerve

medial orbit

caruncle, canaliculi, lacrimal sac, medial eyelids + conj, skin on side of nose