Trigeminal nerve

Question 1

what are the three nuclei of termination of the trigeminal nerv?

Answer 1

main sensory nucleus
spinal nucleus
trigeminal mesencephalic nucleus

Question 2

what is the nucleus of origin for CN 5?

Answer 2

trigeminal motor nucleus

Question 3

what is the one peripheral ganglion associated with CN 5?

Answer 3

trigeminal (semilunar) ganglion

Question 4

what branch of trigeminal carries motor fibers?

Answer 4

mandibular division is the only branch to carry motor fibers

Question 5

what muscles are innervated by CN 5?

Answer 5

masseter
medial and lateral ptergoid
temporalis
mylohyoid
anterior belly digastric
tensor veli palatini
tensor tympani

Question 6

what is the apparent origin of CN 5?

Answer 6

lateral aspect of the pons

Question 7

where is the trigeminal ganglion found?

Answer 7

a pouch of dura the trigeminal (meckel’s) cave

Question 8

where does the trigeminal nerve split into its three divisions?

Answer 8

from the trigeminal ganglion

Question 9

where does the opthalmic division exit the skull?

Answer 9

superior orbital fissure (with CN 3, 4, and 6)

Question 10

what is the sensory distribution of the opthalmic division?

Answer 10

skin over the nose, forehead and scalp, also sensation from mucous membranes in frontal and sphenoid sinuses and membrane covering nasal septum

Question 11

what are the 4 branches of the opthalmic division?

Answer 11

meningeal nerve
lacrimal nerve
frontal nerve
nasociliary nerve

Question 12

what does the meningeal nerve supply?

Answer 12

given off before the opthalmic nerve leaves th superior orbital fissure and supplies the dura in the middle cranial fossa, also supplies the temporal lobes

Question 13

what does the lacrimal nerve supply?

Answer 13

smallest of the branches passes through the lacrimal gland, which it supplies, and goes on to supply the skin of the upper eyelid

Question 14

What nerves does the lacrimal nerve communicate with on its path to the lacrimal gland?

Answer 14

it carries parasympathetic fibers that originate in the ptergopalatine ganglion of CN 7, and reach the lacrimal nerve by way of the zygomatic and zygomaticotemporal nerves of the maxillary division of trigeminal

Question 15

what are the two branches of the frontal nerve?

Answer 15

it is the largest branch and gives rise to:

supratrochlear nerve and the supraorbital nerve

Question 16

what does the supratrochlear nerve supply?

Answer 16

sensation from the medial corner of the eye

Question 17

what does the supraorbital nerve supply?

Answer 17

sensation from the conjunctiva, upper eyelid, and forehead, as well as mucous membrane lining frontal sinus

Question 18

what are the three branches of the nasociliary nerve?

Answer 18

communicating branch to the ciliary ganglion
long ciliary nerve
posterior ethmoid nerve

Question 19

what are the two terminal branches of the nasociliary nerve?

Answer 19

anterior ethmoid nerve

infratrochlear nerve

Question 20

what does the long ciliary nerve supply?

Answer 20

eyeball

Question 21

what does the posterior ethmoid nerve supply?

Answer 21

sensory info from the sphenoidal and ethmoidal sinuses

Question 22

what does the anterior ethmoid nerve supply?

Answer 22

skin over the nose by way of the external nasal nerve, and the mucous membrane covering the anterior part of the nasal septum by way of the internal nasal nerve

Question 23

what does the infratrochlear nerve supply?

Answer 23

medial corner of the eye, including the lacrimal sac

Question 24

what is the sensory distribution of the maxillary division of the trigeminal nerve?

Answer 24

sensation from skin between the eyes and mouth, over the cheeks and temples. also carries info from mucosa lining maxillary sinuses, nasal conchae, palate and gingiva

Question 25

what are the 2 main branches of the maxillary division of the trigeminal nerve?

Answer 25

middle meningeal nerve | zygomatic nerve

Question 26

what are the branches of the zygomatic nerve?

Answer 26

``` communicating branch to the lacrimal nerve zygomaticotemporal nerve zygomaticotemporal nerve two or three ganglionic branches infraorbital nerve superior dental plexus ```

Question 27

what does the middle meningeal branch supply?

Answer 27

given off before the division exits the round foramen and supplies the meninges of the middle cranial fossa

Question 28

where does the zygomatic nerve exit the skull?

Answer 28

the inferior orbital fissure

Question 29

how does the communicating branch to the lacrimal nerve function?

Answer 29

carries postganglionic parasympathetic fibers from the pterygopalatine ganglion to the lacrimal gland by way of the lacrimal nerve

Question 30

what does the zygomaticotemporal nerve supply?

Answer 30

the skin over the temple

Question 31

what does the zygomaticofacial nerve supply?

Answer 31

the skin over the cheek

Question 32

what do the ganglionic branches do?

Answer 32

they carry sensory info from the from the upper pharynx, nasal cavity, and palate through the pterygopalatine ganglion to the maxillary division

Question 33

what does the infraorbital nerve supply?

Answer 33

gives off the posterior, middle, and anterior superior alveolar nerves that carry sensory info from the teeth. also supplies the lower eyelid and the maxillary sinus

Question 34

where is the superior dental plexus found?

Answer 34

just above the alveoli

Question 35

where does the mandibular division exit the skull?

Answer 35

foramen ovale

Question 36

which component of the mandibular division is larger the sensory or motor?

Answer 36

sensory. the roots combine in the infratemporal fossa to form the mandibular division

Question 37

what is the sensory distribution of the mandibular division?

Answer 37

sensation from the skin over the mandible, posterior cheek, and posterior temple. also sensation from mucosa of the lower oral cavity and cheeks

Question 38

what are the muscles of mastication?

Answer 38

masseter, temporalis, and medial and lateral pterygoid

Question 39

what are the two branches given off in the infratemporal fossa?

Answer 39

recurrent meningeal branch (nervous spinosum) | medial pterygoid nerve

Question 40

what is the fxn of the recurrent meningeal nerve?

Answer 40

re enters the cranium through the foramen spinosum and carries sensory info from the dura of the middle cranial fossa, anterior cranial fossa and calvarium

Question 41

what is supplied by the medial ptergoid nerve?

Answer 41

motor supply to the medial ptergoid, but also sends fibers that pass through the otic ganglion to supply the tensor veli palatini, and tensor tympani

Question 42

what is the distribution of the anterior and posterior divisions of the mandibular branch?

Answer 42

anterior division is predominantly motor | posterior division is predominantly sensory

Question 43

what are the branches of the anterior division of the mandibular branch?

Answer 43

masseter nerve deep temporal nerve lateral pterygoid nerve buccal nerve

Question 44

what is supplied by the masseter nerve?

Answer 44

supplies motor innervation to the masseter nerve and sensory info from the temporomandibular joint

Question 45

what is supplied by the deep temporal nerve?

Answer 45

gives rise to an anterior and posterior branch, both supply the temporalis muscle

Question 46

what is supplied by the lateral pterygoid nerve?

Answer 46

latral pterygoid muscle

Question 47

what is supplied by the buccal nerve?

Answer 47

major sensory branch of the anterior division, it conveys sensation from the cheek (skin and mucosal surfaces) and the buccal gingivae of the molars

Question 48

what are the branches of the posterior division of the mandibular branch?

Answer 48

auriculotemporal nerve lingual nenerverve inferior alveolar (two branches)

Question 49

what are the branches of the inferior alveolar nerve?

Answer 49

incisive branch mental nerve motor fibers

Question 50

what does the auriculotemporal nerve supply?

Answer 50

passes through the parotid gland and carries sensory info from the skin of the temple and the ear. also carris some postganglionic parasympathetic fibers from the otic ganglion

Question 51

what does the lingual nerve supply?

Answer 51

sensory info from the mucosa of the oral cavity. it combines with the chorda tympani nerve of CN 7

Question 52

what does the inferior alveolar nerve supply?

Answer 52

sensory info from lower teeth and chin

Question 53

incisive branch of inferior alveolar

Answer 53

supplies incisors canines and 1st premolars

Question 54

what does the mental nerve supply?

Answer 54

labial gingivae adjacent to the incisors and skin of the lower lip and chin

Question 55

what is the fxn of the motor fibers from the inferior alveolar nerve?

Answer 55

diverge from the inferior alveolar nerve before it passes through the mandibular foramen to supply the mylohyoid muscle and the anterior belly of the digastric

Question 56

what two autonomic ganglia communicate with the mandibular division of CN 5?

Answer 56

submandibular gnglion | otic ganglion

Question 57

how does the submandibular ganglion communicate with CN 5?

Answer 57

recieves through the lingual nerve some fibers from CN 7 (chorda tympani nerve)

Question 58

how does the otic ganglion communicate with CN 5?

Answer 58

otic ganglion sends postganglionic parasympathetic fibers to the parotid gland through the auriculotemporal nerve

Question 59

What is inflammation of the trigeminal nerve called?

Answer 59

trigeminal neuralgia (tic doloreaux) person will feel severe burning, episodoc pain in affected area "worst pain ever"

Question 60

dental considerations

Answer 60

lower teeth are all supplied by the inferior alveolar nerve so to work on them the entire nerve needs to be anesthatized upper teeth are supplied individually so anestesia can be administered more specifically