Sensory Innervation Flashcards
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
- ophthalmic + maxillary divisions run in the lateral wall of the cav sin
- the mandibular division travels just below the cav sin
- all three divisons enter the trigeminal ganglion
- fibers enter the lateral pons as the sensory and motor roots of the trigeminal nerve
- 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
(infraorbital)
short ciliary nerve pathway
- travel in the suprachoroid to the posterior globe
- exit the sclera with the psoterior ciliary arteries as 6-10 nerves in a ring around the optic nerve
- pass through the ciliary ganglion (parasymp) as the sensory root of the ciliary ganglion
- 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
- 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
- travel in the suprachoroidal space to the back of the eye (9clock + 3clock)
- leaves the globe 3mm on either side of the optic nerve
- 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
midbrain
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
- infratrochlear
- 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
- nose
- skin of medial nose
- nasal mucosa
- anterior middle of ethmoid sinus
hutchinson sign
- unilateral
- 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
what does the zygomatic nerve innervate
lateral forehead
lateral cheek
lateral lower eyelid
what are the three branches of the ophthalmic nerve
nasociliary, frontal, lacrimal
axenfold loops
- long ciliary nerve loops into sclera before joining to form long ciliary nerve
- darkened pigmented area- usually superior sclera pressure can cause pain
- 5 mm from limbus
