Structures of Mastication

Question 1

dislocation the jaw may occur when mouth is open too wide due to excessive contraction of the __________ muscle

Answer 1

lateral pterygoid

Question 2

where does the lateral pterygoid muscle insert?

Answer 2

neck of mandible

Question 3

where does the temporalis insert?

Answer 3

coronoid process of mandible

Question 4

what goes through the mandibular foramen?

Answer 4

inferior alveolar nerve

Question 5

where does the medial pterygoid insert?

Answer 5

angle of mandible

Question 6

what nerve innervates the msucles of mastication (temporalis, masseter, lateral pterygoid, medial pterygoid)?

Answer 6

mandibular division of trigeminal nerve (V3)

Question 7

what nerve innervates the buccinator?

Answer 7

facial nerve VII

Question 8

maxillary artery arises from? enters what fossa?

Answer 8

external carotid artery, pterygopalatine

Question 9

first branch of maxillary artery supply?

Answer 9

cranium, mandible, and ear (middle meningeal and inferior alveolar artery)

Question 10

second branch of maxillary artery supply?

Answer 10

muscles of mastication

Question 11

third branch of maxillary artery supply?

Answer 11

upper teeth, infraorbital region, nose, and palate (infraorbital artery, descending palatine arteries)

Question 12

mandibular division of trigeminal exits cranium by what fossa?

Answer 12

formen ovale

Question 13

posterior division of mandibular nerve (V3) gives rise to what nerves?

Answer 13

auriculotemporal, inferior alveolar, and lingual nerves

Question 14

the otic ganglion receives preganglionic __________ fibers from CN IX, and distribute postganglionic fibers to the _______ via the ________ nerve

Answer 14

parasympathetic, parotid gland, auriculotemporal

Question 15

innervation to the submandibular and sublingual salivary glands from cranial nerve _____

Answer 15

VII, facial nerve

Question 16

sympathetic innervation for all 3 salivary glands by postganglionic sympathetic fibers from _________, producing _________ in salivary glands

Answer 16

superior cervical ganglion, vasoconstriction

Question 17

lymphoid tissue of the posterior 1/3 of the tongue?

Answer 17

lingual tonsil

Question 18

restricted tongue movement is due to a short ________, cut to release

Answer 18

lingual frenulum

Question 19

intrinsic tongue muscles innervated by?

Answer 19

CN XII, hypoglossal

Question 20

extrinsic muscles of the tongue?

Answer 20

genioglossus, hyoglossus, styloglossus, and palatoglossus

Question 21

what muscles helps protrude the tongue?

Answer 21

genioglossus

Question 22

what muscles helps retract and depress the tongue?

Answer 22

hyoglossus

Question 23

what muscle retracts and elevates the tongue?

Answer 23

styloglossus

Question 24

the genioglossus, hyoglossus, and styloglossus are innervated by?

Answer 24

CN XII, hypoglossal

Question 25

the palatoglossus (exception-extrinisic tongue muscle) is innervated by?

Answer 25

CN X vagus

Question 26

what muscle elevates the posterior part of the tongue?

Answer 26

palatoglossus

Question 27

nerve supply to tongue is by what five cranial nerves?

Answer 27

V3, VII, IX, X, XII (mandibular trigeminal, facial, glossopharyngeal, vagus, hypoglossal)

Question 28

motor supply of tongue muscles provided by? and exception?

Answer 28

CN XII (hypoglossal), exception is palatoglossus by CN X vagus

Question 29

sensory supply for anterior 2/3 of tongue?

Answer 29

lingual nerve, branch of mandibular trigeminal V3

Question 30

taster for anterior tongue?

Answer 30

facial nerve VII via chorda tympani

Question 31

taste and sensation to posterior 1/3 of tongue?

Answer 31

CN IX glossopharyngeal by way of lingual branch

Question 32

gleeking is due to sudden release of saliva from _______ ducts, contracted by ________ muscle

Answer 32

submandibular, mylohyoid

Question 33

all muscles of the soft palate (levator palati, palatopharyngeus, and palatoglossus) are innervated by ________ except the tensor palati innervated by ______

Answer 33

vagus nerve, manidbular trigeminal

Question 34

what muscles tenses the soft palate?

Answer 34

tensor palati, V3

Question 35

what muscle elevates the soft palate?

Answer 35

levator palati, CN X

Question 36

what muscles lowers the soft palate and raises pharynx?

Answer 36

palatopharyngeus, CN X

Question 37

what muscles lowers the soft palate and raises the tongue?

Answer 37

palatoglosssus, CN X

Question 38

circular breathing when close oral cavity with soft palate, pull air into lungs, contract ______ to keep blowing instrument, then raise ________ while exhaling air from lungs into mouth

Answer 38

buccinator, soft palate

Question 39

auditory tubes are open when ________ and ______ muscles contract during swallowing

Answer 39

salpingopharyngeus, tensor palatini

Question 40

lesion of CN ____ will cause uvula to deviate to (affected or unnaffected) side

Answer 40

X vagus, unaffected