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CN V (Maxillary Division Cavernous sinus=>foramen rotundum=>…
CN V
Maxillary Division
Cavernous sinus=>foramen rotundum=>sphenopalatine fossa=>IOF=>orbit
Sensory ONLY
skin of middle part of face
mucosa of nasopharynx
maxillary sinus
soft palate
tonsils
upper teeth & gums
1) Middle Meningeal
arises in mid cranial fossa
Innervates dura mater
2) Sphenopalatine
arises in sphenopalatine fossa=>sphenopalatine ganglion (NO SYNAPSING)
sphenopalatine ganglion=parasympathetic
mucosa of nasopharynx
3) Posterior Superior Alveolar
upper teeth & gums
maxillary sinus
4) Infraorbital
infraorbital sulcus=>orbital infraorbital foramen=>infraorbital canal=>facial infraorbital foramen
Nasal
skin of nose
(BUT NOT THE TIP)
Inf. Palpebral
conj. & skin of lower eyelid region
Labial
skin & mucosa of upper lip
Middle & Anterior Superior Alveolar
inf. meatus of nasal cavity
upper teeth & gums
maxillary sinus
5) Zygomatic
anastomosis w/ inf. div. of lacrimal N
orbital zygomatic foramen=>zygomatic canal=>
provides parasympathetic input to lacrimal gland
Zygomatico-Facial
cheek skin
Zygomatico-Temporal
lateral forehead & temple skin
Ophthalmic Division
(smallest of 3 div.)
Sensory ONLY
eye
orbit
conj.
lac. gland
lac. sac
eyelid skin
nose skin
forehead skin
=> 3 branches w/in cavernous sinus
Lacrimal
(smallest)
enters orbit via SOF (ABOVE annulus of Zinn)
Superior
(smaller)
Lacrimal Gland
=> pierces septum orbitale=>lat palp. nerve
innervates lat. aspect of sup. eyelid
Inferior
(larger)
Lacrimal Gland
=>Anastomoses w/ zygomatic branch of maxillary div.
Parasympathetic input to lacrimal gland
Nasociliary
(mid-sized)
SOLE SENSORY SUPPLY TO THE EYE
enters orbit via SOF (THROUGH annulus of Zinn)
4) Posterior Ethmoidal
post. ethmoidal foramen
mucosa of post. ethmoidal air cells & sphenoidal sinus
2) Long Posterior Ciliary
eye (run w/ long post. ciliary As
)
iris & cornea
3) Infratrochlear
Passes BELOW trochlea=>Pierces septum orbitale
lacrimal sac, carunucle, plica semilunaris
skin of med. canthus & nose
1) Sensory Root to Ciliary Ganglion
PASSES THROUGH CILIARY GANGLION W/O SYNAPSING!!!
short post. ciliary Ns
eye (circle of Haller-Zin)
5) Anterior Ethmoidal
ant. ethmoidal foramen
mucosa of ant. ethmoidal air cells & frontal sinus
External (Dorsal) Nasal
skin @ tip of nose
(clinically sig. in HZO)
Frontal
(largest)
enters orbit via SOF (ABOVE annulus of Zinn)
Supratrochlear
(smaller)
travels above trochlea=>exits orbit medially
conj. & skin of med. eyelid
forehead skin
Supraorbital
(larger)
supraorbital notch=>exits orbit laterally
divides on forehead or w/in orbit
Medial Frontal
(smaller)
skin of forehead & scalp
Lateral Frontal
(larger)
skin of forehead & scalp
Nerve of Kobelt
via supraciliary canal of Ward
Frontal sinus mucosa
Recurrent Nerve of Arnold
(branch before cavernous sinus)
innervates mid-cranial fossa dura
Mandibular Division
(largest or 3 div.)
mid cranial fossa=>foramen ovale=>infratemporal fossa=>ant & post brances
Sensory ONLY
lower lip, teeth and gums
skin of temple, ear, chin & jaw
Properties
Largest CN (3 branches)
Sensory Function
facial cutaneous layer
Eye, internal head mucous membranes
EOM proprioception
(motor nerves don't carry sensory endings)
Motor Function
jaw muscles of mastication
Nuclei
3 sensory
Chief (principal) nucleus
location: Pons
skin input: touch, pressure
Nucleus of Spinal Tract
(caudally from pons=>medulla=>cervical spinal cord)
comma-shaped w/ elongated tail
continuation of chief nucleus
pain & temperature
Mesencephalic nucleus
location: Midbrain
(
rostrally from pons=>midbrain
)
elongated & tapered
proprioception from EOMs & Mastication muscles
1 motor
location: Pons (medial to chief nucleus)
small, rounded
innervates mastication muscles