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Which cranial nerve is the trigeminal nerve?
CN V
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Where does the trigeminal nerve originate?
from pons of brain stem and anteriorly to trigeminal cave
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Where is the trigeminal cave?
in the middle cranial fossa and surrounded by dura
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What is contained within the trigeminal cave?
semilunar (sensory) ganglion of trigeminal nerve
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What divisions arise from the semilunar ganglion of the trigeminal nerve?
- ophthalmic (V1)
- maxillar (V2)
- mandibular (V3)
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The manibular division of the trigeminal nerve is accompanied by what?
motor component of trigeminal nerve
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What does the motor component of the trigeminal nerve innervate?
eight pairs of muscles
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Each of the three divisions of CN V supplies a sensory branch to where?
- cranial dura (meningeal branches)
- sensory component to autonomic ganglion
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Which nerve division is the superior and smallest of the three divisions of trigeminal N?
ophthalmic
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What types of fibers does the ophthalmic division have? (motor or sensory?)
sensory
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What does the opthalmic division supply?
eyeball, lacrimal gland and conjunctiva, part of nasal mucosa and skin of nose, eyelids, forehead and part of scalp
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The opthalmic division sends which branch to the tentorium cerebelli?
meningeal branch
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The ophthalmic division continues anteriorly through with bony structure?
superior orbital fissue
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After passing through the superior orbital fissue, what does the ophthalmic division enter?
bony orbit
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What are the branches of the ophthalmic division of the trigeminal n?
- lacrimal
- frontal
- nasociliary
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Because the branches of the trigeminal go to dura mater they are called:
meningeal branches
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CN V detects pain (irritation) in what part of the body?
meninges
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Where are the sensory cell bodies of all the divisions of the trigeminal nerve located?
semilunar ganglion
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Where are motor cell bodies of the mandibular division of the trigeminal stored?
in the motor nucleus in the brain stem
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What types of fibers does the maxillary division have? (sensory or motor?)
sensory
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Where do branches of the maxillary division go to?
nose, skin, and mucosa of cheek and upper lip, maxillary teeth and palate
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Where does the maxillary division travel?
anteriorly
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Where does the maxillary division exit the skull?
foramen rotundum
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What bony structure does the maxillary division pass through?
pterygopalatine fossa and infratemporal fossa
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After passing through the pterygopalatine fossa and infratemporal fossa the maxillary division enters where?
inferior orbital fissue
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When the maxillary division enters the inferior orbital fissure, what is it then called?
infraorbital nerve
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The infraorbital nerve traverses what to gain access to the face?
infraorbital groove and canal
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The infraorbital nerve emerges from which foramen?
infraorbital foramen
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Which division of the trigeminal nerve is the largest?
mandibular division
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What types of fibers does the mandibular divsion of the trigeminal nerve have? (motor or sensory)
both motor and sensory
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What does the sensory component of the mandibular division supply?
mandibular teeth and gums, skin of temporal region, part of auricle, lower lip, lower part of face, and anterior 2/3 of tongue
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What do the motor fibers of the mandibular divison innervate?
- four mm. of mastication
- tensor mm. of palate and tympanic membrane
- mylohyoid and anterior belly of digastric in floor of mouth
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Where does the mandibular division of the trigeminal exit the skull?
via foramen ovale
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Once the mandibular division of the trigeminal nerve exits the skull via the foramen ovale, what does it enter?
infratemporal fossa
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How many branches does the trunk of the mandibular division give off before it divides into anterior and posterior divisions?
four
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Lingual nerve is a branch of the posterior division of:
the mandibular division of CN V
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Which nerve joins up (hitches a ride) with the lingual nerve?
chorda tympani nerve
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Chorda tympani is a branch of what?
facial nerve
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What does the chorda tympani nerve contain?
preganglionic parasympathetic fibers
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The preganglionic parasympathetic fibers of the chorda tympani nerve are destined for what?
submandibular ganglion
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What do the postganglionic fibers arising from the submandibular ganglion innervate?
submandibular and sublingual glands
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The chorda typmani nerve contains special sensory fibers for what?
taste from anterior 2/3 of tongue
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The general sensory fibers contained in the lingual nerve supply what?
anterior 2/3 of tongue and adjacent gums
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