Exam 2: Trigeminal Nerve
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Exam 2: Trigeminal Nerve
anatomy trigeminal nerve
review of 6/28 lecture on trigeminal nerve for exam 2
Which cranial nerve is the trigeminal nerve?
Where does the trigeminal nerve originate?
from pons of brain stem and anteriorly to trigeminal cave
Where is the trigeminal cave?
in the middle cranial fossa and surrounded by dura
What is contained within the trigeminal cave?
semilunar (sensory) ganglion of trigeminal nerve
What divisions arise from the semilunar ganglion of the trigeminal nerve?
The manibular division of the trigeminal nerve is accompanied by what?
motor component of trigeminal nerve
What does the motor component of the trigeminal nerve innervate?
eight pairs of muscles
Each of the three divisions of CN V supplies a sensory branch to where?
cranial dura (meningeal branches)
sensory component to autonomic ganglion
Which nerve division is the superior and smallest of the three divisions of trigeminal N?
What types of fibers does the ophthalmic division have? (motor or sensory?)
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
The opthalmic division sends which branch to the tentorium cerebelli?
The ophthalmic division continues anteriorly through with bony structure?
superior orbital fissue
After passing through the superior orbital fissue, what does the ophthalmic division enter?
What are the branches of the ophthalmic division of the trigeminal n?
Because the branches of the trigeminal go to dura mater they are called:
CN V detects pain (irritation) in what part of the body?
Where are the sensory cell bodies of all the divisions of the trigeminal nerve located?
Where are motor cell bodies of the mandibular division of the trigeminal stored?
in the motor nucleus in the brain stem
What types of fibers does the maxillary division have? (sensory or motor?)
Where do branches of the maxillary division go to?
nose, skin, and mucosa of cheek and upper lip, maxillary teeth and palate
Where does the maxillary division travel?
Where does the maxillary division exit the skull?
What bony structure does the maxillary division pass through?
pterygopalatine fossa and infratemporal fossa
After passing through the pterygopalatine fossa and infratemporal fossa the maxillary division enters where?
inferior orbital fissue
When the maxillary division enters the inferior orbital fissure, what is it then called?
The infraorbital nerve traverses what to gain access to the face?
infraorbital groove and canal
The infraorbital nerve emerges from which foramen?
Which division of the trigeminal nerve is the largest?
What types of fibers does the mandibular divsion of the trigeminal nerve have? (motor or sensory)
both motor and sensory
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
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
Where does the mandibular division of the trigeminal exit the skull?
via foramen ovale
Once the mandibular division of the trigeminal nerve exits the skull via the foramen ovale, what does it enter?
How many branches does the trunk of the mandibular division give off before it divides into anterior and posterior divisions?
Lingual nerve is a branch of the posterior division of:
the mandibular division of CN V
Which nerve joins up (hitches a ride) with the lingual nerve?
chorda tympani nerve
Chorda tympani is a branch of what?
What does the chorda tympani nerve contain?
preganglionic parasympathetic fibers
The preganglionic parasympathetic fibers of the chorda tympani nerve are destined for what?
What do the postganglionic fibers arising from the submandibular ganglion innervate?
submandibular and sublingual glands
The chorda typmani nerve contains special sensory fibers for what?
taste from anterior 2/3 of tongue
The general sensory fibers contained in the lingual nerve supply what?
anterior 2/3 of tongue and adjacent gums