Temporal/infratemporal fossa

Question 1

temporal fossa

Answer 1

above zygomatic arch

communicates w/ infratemporal arch thru gap between zygomatic arch and more medial surface of skull

Question 2

infratemporal fossa

Answer 2

wedge-shaped space deep to masseter m. and underlying ramus of mandible

Question 3

boundaries of temporal fossa

Answer 3

superior: superior/inferior temporal lines
anterior: frontal and zygomatic bones
lateral: zygomatic arch
inferior: infratemporal crest
floor: frontal, parietal, temporal, GW sphenoid

Question 4

contents of temporal fossa

Answer 4

temporalis m. and fascia

superficial temporal a. and v.

on surface…
CNV- auriculotemporal n.
CNVII - temporal and zygomatic br.

Question 5

superior boundaries of infratemporal fossa

Answer 5

infratemporal crest

on surface of GW sphenoid

Question 6

inferior boundaries of infratemporal fossa

Answer 6

medial pterygoid m. (attaches to the mandible)

Question 7

anterior boundaries of infratemporal fossa

Answer 7

posterior aspect of maxilla

Question 8

posterior boundaries of infratemporal fossa

Answer 8

tympanic plate, mastoid, styloid processes

Question 9

lateral boundaries of infratemporal fossa

Answer 9

ramus of mandible

Question 10

medial boundaries of infratemporal fossa

Answer 10

lateral pterygoid plate

Question 11

contents of the infratemporal fossa

Answer 11

temporalis m. (inferior pt)

pterygoid m. (medial/lateral)

maxillary a. (first 2 parts)

pterygoid venous plexus

V3

otic ganglion

chorda tympani

Question 12

pterygopalatine fossa communicates laterally with…

Answer 12

infratemporal fossa

Question 13

pterygopalatine fossa communicates medially with…

Answer 13

nasal canal via SPHENOPALATINE FORAMEN

Question 14

pterygopalatine fossa communicates anterograde-superiorly with…

Answer 14

orbit via inferior orbital fissure

Question 15

pterygopalatine fossa communicates postero-superiorly with…

Answer 15

middle cranial fossa via
foramen rotundum
vidian (pterygoid) canal

pharyngeal canal (–> nasopharynx)

Question 16

pterygopalatine fossa communicates inferiorly with…

Answer 16

oral cavity via greater palatine canal

Question 17

which arch are mastication m. derived from?

Answer 17

arch 1

Question 18

which m. of mastication is lateral to the infratemporal fossa?

Answer 18

masseter

n.: masseteric br. V3, thru mandibular notch

Question 19

which m. of mastication is particularly susceptible to infection tracking?

Answer 19

temporalis m.

tendon insets very low, close to 3rd molar. infection can travel upward

Question 20

origin of deep head of medial pterygoid m.

Answer 20

medial surface of LATERAL pterygoid plate and pterygoid fossa

Question 21

origin of superficial head of medial pterygoid m.

Answer 21

maxilla tuberosity

Question 22

insertion of both heads of medial pterygoid m.

Answer 22

pterygoid tuberosity on medial surface of mandibular angle

Question 23

origin of superior head of lateral pterygoid m.

Answer 23

GW sphenoid (infratemporal crest)

Question 24

origin of inferior head of lateral pterygoid m.

Answer 24

lateral pterygoid plate (lateral surface)

Question 25

insertion of superior head of lateral pterygoid m.

Answer 25

TMJ (articular disk)

Question 26

insertion of inferior head of lateral pterygoid m.

Answer 26

mandbile (condylar process, pterygoid fovea)

Question 27

3 parts of the maxillary a.

Answer 27

1. mandibular part (bony foramina) 2. pterygoid part (supplies muscles) 3. pterygopalatine part (thru pterygopalatine fossa

Question 28

important br. of mandibular part of maxillary a.

Answer 28

inferior alveolar a. (teeth, mylohyoid m.) middle meningeal a. (dura and calvaria via FS) accessory meningeal a. (dura via FO)

Question 29

pterygoid part of maxillary a. supplies...

Answer 29

muscles

Question 30

important br. of pterygopalatine part of maxillary a.

Answer 30

infraorbital a. posterior superior alveolar a. descending palatine a. sphenopalatine a.

Question 31

the inferior alveolar a. ends as _____ a.

Answer 31

the inferior alveolar a. ends as MENTAL a.

Question 32

Which n. wraps around the middle meningeal a. before ascending upward?

Answer 32

auriculotemporal n.

Question 33

anterior and posterior deep temporal a.

Answer 33

br. of pterygopalatine part of maxillary a. supplies temporalis m.

Question 34

infraorbital a.

Answer 34

br. of pterygopalatine part of maxillary a.

Question 35

descending palatine a.

Answer 35

br. of pterygopalatine part of maxillary a. supplies roof of mouth

Question 36

sphenopalatine a.

Answer 36

terminal br. of maxillary a. goes thru sphenopalatine foramen supplies lateral nasal wall, nasal septum, paranasal sinuses

Question 37

which a. provides blood supply to maxillary molars?

Answer 37

posterior superior alveolar a.

Question 38

pterygoid venous plexus

Answer 38

- communicates w/ facial v. and cavernous sinus - valveless (*infection to teeth) - VERY THIN

Question 39

cavernous sinus drains through ______ and _______ to the pterygoid plexus

Answer 39

cavernous sinus drains through PETROSAL SINUSES and EMISSARY V. to the pterygoid plexus

Question 40

articular tubercle

Answer 40

holds mandible in place prevents dislocation of jaw

Question 41

ligaments of the TMJ

Answer 41

lateral ligament (TMJ ligament) sphenomandibular ligament stylomandibular ligament

Question 42

articular surface of the TMJ

Answer 42

condyle of mandible articular tubercle of temporal bone mandibular fossa

Question 43

lateral ligament of TMJ

Answer 43

strengthens TMJ laterally w/ postglenoid tubercle, presents posterior dislocation of the joint

Question 44

sphenomandibular ligament

Answer 44

spine of sphenoid to lingual of mandible main passive support of mandible serves as a "swinging hinge" for mandible

Question 45

stylomandibular ligament

Answer 45

thickening in fibrous fascia of parotid gland stabilizes mandible in extreme, protrusive movements

Question 46

motions of TMJ

Answer 46

up to 15 degrees abduction --> SWING motion (head of mandible still in mandibular fossa) past 15 degrees --> head of mandible GLIDES onto articular tubercle

Question 47

two articular cavities (superior/inferior) are separated by ______

Answer 47

fibrocartilage disc (articular disc) attaches to margin of articular area on temporal bone and around neck of mandible

Question 48

anterior boundary of pterygopalatine fossa

Answer 48

posterior aspect of maxilla

Question 49

posterior boundary of pterygopalatine fossa

Answer 49

pterygoid process of sphenoid bone

Question 50

roof of pterygopalatine fossa

Answer 50

incomplete, greater wing of sphenoid

Question 51

floor of of pterygopalatine fossa

Answer 51

pyramidal process of palatine bone

Question 52

TMJ n. supply

Answer 52

mandibular n. (V3) - auriculotemporal n. - deep temporal n. - masseteric n.

Question 53

Which CN lie w/i the cavernous sinus?

Answer 53

CN III CN IV CN V1,V2 CN VI

Question 54

inferior alveolar a. has a br. to which m.?

Answer 54

mylohyoid m.

Question 55

important br. of pterygoid part of maxillary a.

Answer 55

anterior and posterior deep temporal a.