muscles of mastication

Question 1

muscles of mastication innervation

Answer 1

mandibular nerve (V3)

Question 2

elevates and retracts mandible

Answer 2

temporalis and masseter

Question 3

temporalis originates at ___ and inserts on ____

Answer 3

temporal fossa
coronoid process of mandible

Question 4

masseter originates at ____ specifically the ___ of zygomatic bone and inserts on ____

Answer 4

zygomatic arch
maxillary process
angle and lateral surface of mandible

Question 5

triangular 2 headed muscle

Answer 5

lateral pterygoid

Question 6

1 head of lateral pterygoid originates from ___ and the other head originates from ____ both insert on ____

Answer 6

base of skull
lateral surface of lateral pterygoid plate
joint capsule and articular disc of TMJ and condyloid process of mandible

Question 7

bilateral: protrude mandible and initiates jaw opening

Answer 7

lateral pterygoid

Question 8

unilateral: lateral mandible movements

Answer 8

lateral and medial pterygoid

Question 9

quadrangular two headed muscle

Answer 9

medial pterygoid

Question 10

1 head of medial pterygoid originates from ___ and the other head originates from ____ both heads insert on ____

Answer 10

medial surface of lateral pterygoid plate
maxilla
medial surface of ramus of mandible

Question 11

mirror image of masseter

Answer 11

medial pterygoid

Question 12

bilateral: elevate and protrudes mandible

Answer 12

medial pterygoid

Question 13

depression of mandible involves ___ and ___ and ___ when resistance is involved

Answer 13

gravity
suprahyoid
infrahyoid

Question 14

elevation of mandible involves ___, ___, and ___

Answer 14

temporalis
masseter
medial pterygoid

Question 15

retraction of mandible involves ____ and ____

Answer 15

posterior fibers of temporalis
masseter

Question 16

protrusion of mandible involves ___ assisted by ___, and minor assistance by ____

Answer 16

lateral pterygoid
medial pterygoid
masseter

Question 17

lateral movements (grinding and chewing) of mandible involves ____ and ____ of same side and ___ of opposite side

Answer 17

temporalis
masseter
pterygoids

Question 18

dislocation of TMJ results from the heads of the mandibles dislocating ____ meaning they pass anterior to ____

Answer 18

anteriorly
articular tubercles

Question 19

largest branch of external carotid artery in the neck and is a major source of blood supply for the nasal cavity, lateral walls and roof of oral cavity, all teeth and the dura mater in the cranial cavity

Answer 19

maxillary artery

Question 20

1st part of maxillary artery gives rise to the ____ and ____ arteries

Answer 20

middle meningeal
inferior alveolar

Question 21

2nd part of maxillary artery gives origin to ____, ___, ___, and ____ which course with branches of mandibular nerve

Answer 21

deep temporal
masseteric
buccal
pterygoid branches

Question 22

3rd part of maxillary artery enters the ____ and gives rise to ___ and ___ arteries

Answer 22

pterygopalatine fossa
posterior superior alveolar
infra-orbital

Question 23

occupies most of the IT fossa

Answer 23

pterygoid venous plexus

Question 24

pterygoid venous plexus is located partly between the ___ and ___ muscles

Answer 24

temporalis
pterygoid

Question 25

the pterygoid venous plexus drains anterior to the ___ vein via the ____ vein but mainly drains posteriorly via the ___ and then ___ veins

Answer 25

facial deep facial maxillary retromandibular

Question 26

the mandibular nerve arises from the trigeminal ganglion in the ____

Answer 26

middle cranial fossa

Question 27

the mandibular nerve provides ___ and ___ functions

Answer 27

sensory motor

Question 28

the mandibular nerve descends through the ___ into the IT fossa

Answer 28

foramen ovale

Question 29

the branches of CN V3

Answer 29

deep temporal (motor) masseteric (motor) buccal (sensory) auriculotemporal inferior alveolar lingual meningeal nerve to tensor tympani

Question 30

also present in IT fossa and is located near the mandibular nerve but is connected functionally to CN IX

Answer 30

otic ganglion

Question 31

pass superiorly to enter the temporal fossa deep to the temporalis muscle to supply it

Answer 31

deep temporal nerve (motor)

Question 32

pass laterally over the margin of the mandibular notch to enter the deep surface of the masseter muscle

Answer 32

masseteric nerve (motor)

Question 33

passes posteriorly to the beck of the mandible and supplies sensory fibers to auricle and temporal region and TMJ

Answer 33

auriculotemporal nerve

Question 34

the auriculotemporal nerve may encircle the ____

Answer 34

middle meningeal artery

Question 35

the auriculotemporal nerve conveys ____ fibers from otic ganglion to the parotid gland

Answer 35

postsynaptic parasympathetic secretomotor

Question 36

enters the mandibular foramen and passes through the mandibular canal

Answer 36

inferior alveolar nerve

Question 37

inferior alveolar nerve supplies ____

Answer 37

all mandibular teeth on its side

Question 38

inferior alveolar gives small branch ____ that innervate mylohyoid and anterior belly of digastric

Answer 38

nerve to mylohyoid

Question 39

terminal branch of mandibular nerve is the ___ and supplies the skin and mucous membrane of the lower lip and skin of the chin

Answer 39

mental nerve

Question 40

lies anterior to the inferior alveolar nerve and passes anteriorly under cover of the oral mucosa, medial and inferior to the 3rd molar tooth that provides sensory to the anterior 2/3 of the tongue, the floor of the mouth and the lingual gingivae

Answer 40

lingual nerve

Question 41

the ___ joins the lingula nerve in the IT fossa

Answer 41

chorda tympani n.

Question 42

chorda tympani carries taste fibers from ____

Answer 42

anterior 2/3 of tongue

Question 43

chorda tympani carries ____ for submandibular and sublingual salivary glands

Answer 43

preganglionic parasympathetic fibers

Question 44

the dura on the floors of the anterior and middle cranial fossa and the roof of the posterior cranial fossa are innervated by ____ arising directly or indirectly from the trigeminal nerve

Answer 44

meningeal branches

Question 45

all divisions of CN V supply ____

Answer 45

sensation to dura

Question 46

anterior cranial fossa

Answer 46

all 3 divisions of CN V

Question 47

middle cranial fossa

Answer 47

mostly V3

Question 48

the meningeal branch of V3 ascends to leave the IT fossa with ___ and reenter the cranial cavity through the ____

Answer 48

middle meningeal artery foramen spinosum

Question 49

also supplies the mastoid cells that communicate with the middle ear

Answer 49

meningeal nerve