03c: Infratemporal Fossa Flashcards Preview

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Flashcards in 03c: Infratemporal Fossa Deck (40):
1

Major borders of temporal fossa.

Medial: Pterion (frontal, parietal, temporal, greater wing sphenoid)
Lateral: Zygomatic arch

2

Temporal fossa contents.

Temporalis and supplying neurovasculature

3

Lateral border of infra temporal fossa.

Ramus of mandible

4

Medial border of infra temporal fossa.

Lateral pterygoid plate

5

Anterior border of infra temporal fossa.

Maxilla

6

Posterior border of infra temporal fossa.

1. Styloid and mastoid processes
2. Tympanic plate

7

Superior border of infra temporal fossa.

Inferior surface of greater wing sphenoid

8

Musculoskeletal structures in infratemporal fossa.

1. Medial and lateral pterygoid
2. TMJ

9

Nerves in infratemporal fossa

1. Most V3 branches
2. Chorda tympani (CN VII branch)
3. Otic ganglion

10

Vasculature in infratemporal fossa.

Majority of maxillary artery

11

Which key landmark separates that divisions of maxillary artery? List each division and its relationship to that landmark.

Lateral pterygoid muscle;

1. Mandibular (lateral)
2. Pterygoid (along/superficial)
3. Pterygopalatine (medial)

12

List branches off maxillary artery in first, (X), division.

X = mandibular

1. Anterior tympanic
2. Middle meningeal
3. Inferior alveolar

13

Anterior tympanic artery supplies:

Middle ear

14

Which maxillary artery branch is often site of bleeding in (X) hematomas?

X = epidural;

Middle meningeal

15

Inferior alveolar artery travels into/through (X) and with (Y).

X = mandible;
Y = inferior alveolar nerve (V3)

16

Second, (X), division of maxillary artery supplies:

X = pterygoid

1. Masseter and temporalis
2. Pterygoid muscles
3. Buccinator

17

Which division(s), if any, of maxillary artery course through pterygopalatine fossa?

Pterygopalatine (third)

18

List branches off maxillary artery in third, (X), division. Star the ones give off in (Y), before it passes through (Z).

X = pterygopalatine
Y = infratemporal fossa
Z = pterygomaxillary fissure

1. Posterior superior alveolar*
2. Infraorbital
3. Descending palatine
4. Sphenopalatine
5. Pharyngeal
6. Artery of pterygoid canal

19

Territory supplied by maxillary artery is drained by (X). Anteriorly, (X) drains into (Y) via (Z).

X = pterygoid plexus of veins
Y = facial vein
Z = deep facial vein

20

Territory supplied by maxillary artery is drained by (X). Superiorly, (X) drains into (Y) via (Z).

X = pterygoid plexus of veins
Y = cavernous sinus or orbit
Z = emissary veins or inferior opthalmic vein

21

Pterygoid plexus of veins is significant potential connection between:

External face and intracranial dural venous sinuses

22

Muscles involved in protrusion of jaw.

1. Lateral pterygoid
2. Medial pterygoid (assists)

23

Muscles involved in elevation of jaw.

1. Temporalis and masseter
2. Medial pterygoid

24

Muscles involved in retraction of jaw.

1. Posterior temporalis
2. Deep part of masseter
3. Geniohyoid and digastric

25

Muscles involved in depression of jaw.

1. Digastric
2. Geniohyoid
3. Mylohyoid

26

Sphenomandibular ligament is on (X) surface of mandible and connects to which processes?

X = medial
Spine of sphenoid and lingula of mandible

27

Stylomandibular ligament is on (X) surface of mandible and connects to which processes?

X = medial
Styloid process and angle of mandible

28

Gently opening mouth. What motions at R and L TMJ?

Rotation of R andL mandible heads in mandibular fossae

29

Widely opening mouth. What motions at R and L TMJ?

Heads of mandibles and articular discs move anteriorly until positioned under articular tubercle; mandible depressed

30

Protrusion/retraction of jaw. What motions at R and L TMJ?

Heads of mandibles and articular discs move anteriorly until positioned under articular tubercle; mandible NOT depressed/elevated

31

Chin moved laterally to right. What motions at R and L TMJ?

R: pivoting and retraction
L: sliding anteriorly (protraction)

32

Which muscle is the primary retractor of mandible?

Temporalis

33

(X) muscle is the mirror image of masseter.

X = medial pterygoid

34

(X) mastication muscles close jaw and (Y) mastication muscles open jaw.

X = 3 (masseter, temporalis, medial pterygoid)
Y = 1 (lateral pterygoid)

35

Which muscle of mastication attaches to (X) of TMJ?

X = joint capsule and disc

Superior head of lateral pterygoid

36

T/F: Most of the TMJ has no sensory innervation.

False - disc doesn't but rest of joint is highly sensitive

37

TMJ sensory fibers primarily travel in branches of (X) nerves, which are collectively part of (Y) nerve.

X = Auriculotemporal, masseteric
Y = mandibular division of CN V

38

Unilateral contraction of lateral pterygoid will cause jaw to:

Swing to contralateral side

39

Muscles of mastication propioceptive awareness (to control force of bite) is carried by afferent fibers from (X) structures to (Y).

X = muscle spindles
Y = Mesencephalic Nucleus of V

40

Vascularization of TMJ via branches of (X) artery/arteries.

X = superficial temporal and maxillary