Temporal region

Question 1

infratemporal fossa is located:

Answer 1

deep and inferior to zygomatic arch, deep to the ramus of the mandible, and posterior to the maxilla

Question 2

contents of the infratemporal fossa:

Answer 2

inferior part of temporalis muscle, lateral and medial pterygoids, maxillary artery, pterygoid venous plexus, mandibular, inferior alveolar, lingual, buccal, and chorda tympani nerves, and otic ganglion

Question 3

what type of joint is TMJ?

Answer 3

modified hinge synovial

Question 4

TMJ is formed between the:

Answer 4

mandibular condyle and the mandibular fossa and articular tubercle of temporal bone

Question 5

lower part of TMJ allows:

Answer 5

mainly hinge-like depression and elevation

Question 6

upper part of TMJ allows:

Answer 6

protrusion and retraction

Question 7

lateral ligament of TMJ:

Answer 7

strengthens joint laterally

Question 8

sphenomandibular ligament of TMJ:

Answer 8

primary passive support of the mandible

Question 9

stylomandibular ligament of TMJ:

Answer 9

does not contribute significantly to the strength of the joint

Question 10

temporalis attachments:

Answer 10

floor of temporal fossa to coronoid process of mandible

Question 11

innervation of temporalis

Answer 11

mandibular nerve

Question 12

temporalis action

Answer 12

elevation and retraction of mandible

Question 13

masseter attachments

Answer 13

zygomatic arch to angle and lateral surface of ramus of mandible

Question 14

innervation of masseter

Answer 14

mandibular nerve

Question 15

action of masseter

Answer 15

elevate mandible and contribute to protrusion

Question 16

lateral pterygoid attachments

Answer 16

superior head- inframtemporal surface of sphenoid to joint capsule and articular disc of TMJ; inferior head- lateral surface of lateral pterygoid plate to anteromedial aspect of mandibular condyle

Question 17

lateral pterygoid innervation

Answer 17

mandibular nerve

Question 18

lateral pterygoid action

Answer 18

bilaterally- protracts mandible and depresses chin; unilateral- swings jaw to CL side

Question 19

medial pterygoid attachments

Answer 19

superficial head- medial surface of lateral pterygoid plate to medial surface of mandibular ramus; deep head- posterior maxilla to medial surface of mandibular ramus

Question 20

medial pterygoid innervation

Answer 20

mandibular nerve

Question 21

medial pterygoid action

Answer 21

elevates mandible and contributes to protrusion

Question 22

protrusion of TMJ is caused by:

Answer 22

lateral pterygoid, assisted by medial pterygoid and superficial head of masseter

Question 23

retraction of TMJ is caused by:

Answer 23

posterior fibers of temporalis, deep part of masseter, and geniohyoid and digastric

Question 24

elevation of TMJ is caused by:

Answer 24

temporalis, masseter, and medial pterygoid

Question 25

depression of TMJ is caused by:

Answer 25

gravity, lateral pterygoid, digastric, geniohyoid, and mylohyoid

Question 26

during yawning or taking a large bite, excessive contraction of what muscle can cause the head of the mandible to dislocate anteriorly:

Answer 26

lateral pterygoids

Question 27

larger terminal branch of ECA:

Answer 27

maxillary artery

Question 28

maxillary artery supplies blood for:

Answer 28

nasal cavity, lateral wall and roof of oral cavity, all teeth, and dura mater

Question 29

three parts of maxillary artery:

Answer 29

mandibular, pterygoid, and pterygopalatine

Question 30

mandibular/part 1 of maxillary artery:

Answer 30

middle meningeal and inferior alveolar arteries

Question 31

pterygoid/part 2 of maxillary artery:

Answer 31

deep temporal, pterygoid, masseteric, and buccal arteries

Question 32

middle meningeal artery supplies:

Answer 32

dura mater

Question 33

middle meningeal artery enters cranial cavity through the:

Answer 33

foramen spinosum

Question 34

an extradural hematoma is caused by:

Answer 34

a lateral blow to the head causing the middle meningeal artery to leak blood separating the dura from the bone

Question 35

pterygoid venous plexus is located between the:

Answer 35

temporalis and pterygoid muscles

Question 36

most veins accompanying branches of maxillary artery drain into:

Answer 36

pterygoid venous plexus

Question 37

pterygoid venous plexus anastomoses with:

Answer 37

facial vein and cavernous sinus

Question 38

mandibular nerve branches:

Answer 38

meningeal, nerve to medial pterygoid, branch to tensor tympani, and branch to tensor veli palatini

Question 39

anterior trunk of mandibular nerve:

Answer 39

buccal, masseteric, deep temporal, and nerve to lateral pterygoid

Question 40

posterior trunk of mandibular nerve:

Answer 40

auriculotemporal, lingual, and inferior alveolar nerve

Question 41

in the infratemporal fossa, branches of CN V3 are joined by:

Answer 41

branches from CN VII and IX

Question 42

chorda tympani branch of facial nerve

Answer 42

joins the lingual nerve and conveys fibers to submandibular ganglion which gives off fibers to the salivary glands

Question 43

lesser petrosal nerve of glosspharyngeal nerve

Answer 43

carries fibers to otic ganglion which then travel via auriculotemporal nerve to parotid nerve

Question 44

walls pterygopalatine fossa are formed from:

Answer 44

maxilla (anterior wall), palatine (medial wall), and sphenoid (posterior wall and roof)

Question 45

contents of pterygopalatine fossa

Answer 45

3rd part of maxillary artery and branches, accompanying veins, maxillary nerve, pterygopalatine ganglion

Question 46

3rd part of maxillary artery:

Answer 46

posterior superior alveolar, infraorbital, descending palatine, pharyngeal branch, artery of pterygoid canal, and sphenopalatine artery

Question 47

infraorbital nerve gives off what 2 nerves?

Answer 47

middle superior alveolar and anterior superior alveolar nerves

Question 48

infraorbital nerve is a branch of:

Answer 48

maxillary nerve

Question 49

maxillary nerve gives off what branches within the pterygopalatine fossa?

Answer 49

zygomatic, posterior superior alveolar, and 2 ganglionic branches

Question 50

zygomatic nerve enters orbit via:

Answer 50

IOF

Question 51

zygomatic nerve divides into:

Answer 51

zygomaticotemporal and zygomaticofacial nerves

Question 52

zygomaticotemporal nerve supplies:

Answer 52

skin over temple

Question 53

zygomaticofacial nerve supplies:

Answer 53

skin over zygomatic bone

Question 54

posterior superior alveolar nerve supplies:

Answer 54

maxillary molar teeth, buccal gingivae, and maxillary sinus

Question 55

nerve of the pterygoid canal is formed by union of:

Answer 55

greater petrosal and deep petrosal nerves

Question 56

greater petrosal nerve carries PSN fibers to:

Answer 56

all glands above oral fissure

Question 57

deep petrosal nerve carries fibers mainly to:

Answer 57

blood vessels