Infratemporal Fossa Flashcards Preview

Gross II > Infratemporal Fossa > Flashcards

Flashcards in Infratemporal Fossa Deck (45):
1

What are the borders of the infratemporal fosaa

Anterior: maxilla
Medial: lateral pterygoid plate
Roof: greater wing of sphenoid
lateral: ramus of mandible

2

What three areas communicate with the infratemporal foss

Superiorly: Temporal Fossa
Cranial Cavity: Foramen Ovale, Foramen Spinosum,
Orbit: inferior orbital fissure

3

What is the origin of the medial pterygoid muscle

Medial surface of the lateral pterygoid plate of sphenoid

4

What is the insertion of the medial pterygoid

Medial surface of the ramus of the mandible

5

What is the action of the medial pterygoid

elevates, contralaterally deviates, and protracts the mandible

6

What is the innervation of the medial pterygoid muscle

Medial pterygoid nerve (V3)

7

What is the origin of the lateral pterygoid

Inf Head: lateral surface of pterygoid plate
Sup Head: Greater wing of the sphenoid

8

What is the insertion of the lateral pterygoid

Neck of the mandibular condyle, TMJ capsule, articular disc

9

What is the action of the lateral pterygoid muscle

Depresses, contralaterally deviates and protracts the mandible

10

What is the innervation of the lateral pterygoid muscle

Lateral pterygoid nerve (V3)

11

What is the origin of the masseter

zygomatic arch

12

What is the insertion of the masseter

lateral surface of mandibular ramus

13

What is the action of the masseter muscle

elevates the mandible and protrudes

14

What is the innervation of the masseter muscle

Masseteric nerve (V3)

15

What is the origin of the temporalis muscle

temporal fossa

16

What is the insertion for the temporalis muscle

coronoid process of mandibular ramus

17

What is the action of the temporalis muscle

elevates and retracts the mandible

18

What is the innervation of the temporalis muscle

Deep Temporal nerves (V3)

19

What is the major artery of the infratemporal fossa

Maxillary artery

20

What does the auricular artery and tympanic artery supply

Ext ear, ext auditory canal, tympanic membrane, TMJ

21

What does the middle meningeal artery supply

cranial dura, cranial bones

22

How does the inferior alveolar artery travel

enters the mandible on its medial surface via the mandibular foramen and traverses the mandibular canal

23

What does the inferior alveolar artery supply

mandible
teeth and gums
soft tissues of the chin

24

What muscles are innervated by the muscular branches of the maxillary artery

Temporalis
Masseter
Pterygoids

25

What is supplied by the buccal artery

soft tissues of the cheek

26

What is supplied by the posterior superior alveolar artery

posterior teeth of the upper jaw

27

What is supplied by the infraorbital artery

anterior face, maxillary sinus, anterior teeth of maxilla

28

What is supplied by the sphenopalatine artery

nasal cavity
palate
sinuses

29

How does the sphenopalatine artery enter the sphenopalatine fossa

passes through the pterygomaxillary fissure

30

Where do the veins of the infratemporal fossa drain to

pterygoid venous plexus of veins

31

Where does the pterygoid plexus drain into

facial or retromandibular veins

32

What type of neurons make up the mandibular nerve (V3)

sensory and motor neurons

33

How does V3 enter the infratemporal fossa

foramen ovale

34

What do the motor branches innervate

muscles of mastication

35

What is innervated by the meningeal nerve

Dura of the middle cranial fossa

36

What are the muscular branches of the mandibular nerve

Masseteric n
Medial pterygoid n
Lateral pterygoid n
Deep temporal nerves (temporalis muscle)

37

What is innervated by the Buccal nerve

sensory to the skin of the cheek and mucous membrane inside the cheek

38

What is innervated by the auriculotemporal nerve

pinna of the ear
skin of the temporal region
some of the tympanic membrane
TMJ -- **important**

39

What is innervated by the lingual nerve

sensory to the anterior 2/3 of tongue
floor of the oral cavity

40

What is the chorda tympani nerve a branch of

CN 7

41

How does the chorda tympani nerve travel

hitchhikes with the lingual nerve

42

What is innervated by the inferior alveolar nerve

all teeth of the lower jaw

43

What are the two terminal branches from the inferior alveolar nerve

Mental nerve
myolohyoid nerve

44

What is innervated by the mental nerve

skin near the chin and lower lip

45

What is innervated by the myolohyoid nerve

motor to myolohyoid and anterior belly of digastric muscles