Nerves of Oral Cavity

Question 1

nerves of the oral cavity include:

Answer 1

Trigeminal n. (CN V)
Facial n. (CN VII)
Glossopharyngeal n. (CN IX)
Hypoglossal n. (CN XII)

Question 2

the trigeminal nerve originates in the ____

Answer 2

trigeminal ganglion

Question 3

3 divisions of the trigeminal n.

Answer 3

1. ophthalmic n (not to mouth)
2. maxillary n. (to maxillary teeth)
3. mandibular n. (to all mandibular teeth and muscles of mastication)

Question 4

the ophthalmic nerve exits the cranium via the ____ in the ____ bone

Answer 4

superior orbital fissure; sphenoid

Question 5

3 main branches of the ophthalmic n.

Answer 5

lacrimal n.
nasociliary n.
frontal n.

Question 6

the maxillary n. exits the cranium via ____ in the sphenoid bone and goes into the _____

Answer 6

foramen rotundum; pterygopalatine space

Question 7

4 branches of the maxillary n.

Answer 7

1. pterygopalatine n.
2. posterior superior alveolar n.
3. infraorbital n.
4. zygomatic n.

Question 8

_____ (a branch of the pterygopalatine n.) passes through _____ to become the _____

Answer 8

descending palatine n.; greater palatine foramen; greater palatine n.

Question 9

greater palatine n. supplies ____

Answer 9

mucosa of the posterior 2/3 of the hard palate and gingiva

Question 10

branches of the pterygopalatine n.

Answer 10

1. greater palatine n. (via descending palatine n.)
2. nasopalatine n.
3. lesser palatine n.

Question 11

nasopalatine branch supplies ____

Answer 11

anterior 1/3 of the hard palate

Question 12

lesser palatine branch goes to ____

Answer 12

tonsils and soft palate

Question 13

greater palatine enters palate through the _____

Answer 13

greater palatine foramen

Question 14

nasopalatine enters palate through _____

Answer 14

incisive foramen

Question 15

lesser palatine enters palate through ____

Answer 15

lesser palatine foramina

Question 16

PSA n. separates from the maxillary n. before its entry into the ____; it enters the maxillae behind and above the ____ through alveolar canals

Answer 16

infraorbital fissure; third molars

Question 17

PSA n. goes to _____: pulps, ligaments, alveolar bone, and facial gingiva

Answer 17

maxillary molars

Question 18

PSA n. supplies the maxillary molars EXCEPT _____

Answer 18

the mesiobuccal root of the maxillary first molars

Question 19

branches of the infraorbital n.

Answer 19

middle superior alveolar n. (MSA)

anterior superior alveolar n. (ASA)

Question 20

MSA goes to ____ and MB root of maxillary 1st molars as well as facial gingiva, bone, and ligament

Answer 20

maxillary premolar pulps

Question 21

ASA branches to ____, facial gingiva, part of sinus, etc.

Answer 21

anterior teeth

Question 22

infraorbital n. goes through the _____ (roof of maxillary sinus) giving off MSA and ASA

Answer 22

infraorbital canal

Question 23

terminal branches of the infraorbital n. go through the _____ to the upper lip and nose

Answer 23

infraorbital foramen

Question 24

zygomatic branch of the maxillary n. supplies skin of ____ and ____ (not to mouth)

Answer 24

temporal; orbit region

Question 25

branches of the mandibular n.

Answer 25

1. auriculotemporal n. 2. buccal n. (long buccal/buccinator n.) 3. lingual n. 4. inferior alveolar n.

Question 26

mandibular n. exits the cranium via ____

Answer 26

foramen ovale

Question 27

auriculotemporal n. provides sensation to the ____ and skin of the ____ anterior to the ear

Answer 27

outer ear; face

Question 28

auriculotemporal n. provides proprioception to the ____

Answer 28

TMJ

Question 29

buccal n. goes through ____ between heads of lateral pterygoid mm. to buccal gingiva of ____ and ____ (and buccal mucosa and skin of cheeks up to corner of mouth or commissure)

Answer 29

infratemporal space; molars and premolars

Question 30

buccal n. goes ____ to the ____ of the mandible, to the cheek and mucosa/gingiva next to the molars

Answer 30

lateral; ramus

Question 31

the facial nerve (CN VII) exits brain case via ____ into the _____

Answer 31

internal acoustic meatus; petrous part of the temporal bone

Question 32

the facial nerve is a ____ nerve with ____ and ____ branches

Answer 32

mixed; afferent; efferent

Question 33

branches of the facial nerve exit the temporal bone via ____ becoming ____ (for taste) and joining the ____ branch of CN V to the ____

Answer 33

petrotympanic fissure; chorda tympani; lingual; anterior 2/3 of the tongue

Question 34

branches of the facial nerve exit the temporal bone via _____ for efferent fibers

Answer 34

stylomastoid foramen

Question 35

efferent fibers of the facial nerve (CN VII) innervate the muscles of ____, including orbicularis oris and buccinator

Answer 35

facial expression

Question 36

secretory fibers of the facial nerve control secretion of the ____ and ____ salivary glands

Answer 36

submandibular; sublingual

Question 37

glossopharyngeal nerve (CN IX) exits the cranium via the _____

Answer 37

jugular foramen

Question 38

afferent fibers of CN IX supply _____ for general sensation and taste ; also go to the pharynx and tonsils

Answer 38

posterior 1/3 of the tongue

Question 39

secretory fibers of CN IX supply the ____

Answer 39

parotid gland

Question 40

efferent fibers of CN IX supply the muscles of the ____

Answer 40

pharynx

Question 41

hypoglossal n. (CN XII) exits the cranium via the ____ (on the walls of foramen magnum)

Answer 41

hypoglossal canals

Question 42

efferent fibers of the hypoglossal n. go to the muscles that move the ____

Answer 42

tongue

Question 43

afferent fibers to the tongue

Answer 43

CN V: general sensation to ant. 2/3 of tongue CN VII: taste to anterior 2/3 of tongue CN IX: general sensation and taste to posterior 1/3 of tongue

Question 44

efferent fibers to the tongue

Answer 44

CN XII: muscles that move the tongue

Question 45

____ (tongue m.) is innervated by CN X

Answer 45

palatoglossus

Question 46

secretory fibers to the salivary glands

Answer 46

CN VII: to submandibular and sublingual glands | CN IX: to parotid gland

Question 47

branch of the external carotid a. that goes to the tongue, floor of the mouth, sublingual gland, and adjacent gingiva

Answer 47

lingual a.

Question 48

branch of external carotid a. that goes to the soft palate, tonsils, pharynx, chin, floor of the mouth, and lips and nose

Answer 48

facial a.

Question 49

branch of the external carotid a. that goes to all maxillary and mandibular teeth and muscles of mastication

Answer 49

maxillary a.

Question 50

3 parts of the maxillary a.

Answer 50

mandibular part pterygoid part pterygopalatine part

Question 51

the mandibular part of the maxillary a. (to the mandible) includes the ____ (to molars and premolars), the ____ (to the chin and lower lip), and the ____ (to anterior teeth)

Answer 51

inferior alveolar mental incisive

Question 52

the pterygoid part of the maxillary a.(to the muscles) goes to the _____ and ____ muscle

Answer 52

muscles of mastication; buccinator

Question 53

the pterygopalatine part of the maxillary a. (to the maxillae) includes the ____ (to the molars), ____ (to the premolars and anterior teeth), and the _____ (to the nasal cavity, palate, and lingual gingiva)

Answer 53

PSA; infraorbital branches MSA and ASA; descending palatine

Question 54

veins drain blood from the face into the _____

Answer 54

common facial vein

Question 55

blood from the upper part of the face, including maxillary teeth is collected by the _____

Answer 55

pterygoid plexus

Question 56

the ____ drains the mandible and lower teeth into the pterygoid plexus

Answer 56

inferior alveolar v.

Question 57

the pterygoid plexus empties into the ____ and into the _____

Answer 57

maxillary vein; retromandibular v.

Question 58

the ____ runs parallel to the facial a. and collects from the ____ and ____ veins and muscles of mastication, nose, and eyes

Answer 58

facial v.; superior labial; inferior labial;

Question 59

the ____ collects blood from the tongue

Answer 59

lingual v.

Question 60

all orofacial veins drain via the ____ into the ____, ____ and to the heart

Answer 60

common facial vein; internal jugular v.; superior vena cava

Question 61

____ nodes drain the cheek, ear, and eyelids

Answer 61

parotid

Question 62

_____ nodes drain tip of tongue, anterior part of lower lip, anterior part of floor of mouth, and mandibular incisors

Answer 62

submental

Question 63

_____ nodes drain other maxillary and mandibular teeth, as well as posterior floor, tongue, upper lip, and part of the lower lip

Answer 63

submandibular