Infratemporal Fossa

Front 1

contents of ITF

Back 1

inferior part of temporalis
maxillary A and brchs
V3 and branches
pterygoid venous plexus
medial and lateral pterygoid
chorda tympani
otic ganglion

Front 2

what is temporal fossa

Back 2

depression on lateral cranial wall that is attachment site for temporalis muscle (superiorly attached to temporal lines and inferiorly to zygomatic arch

Front 3

function of temporalis muscle

Back 3

muscle of mastication

Front 4

location of infratemporal fossa

Back 4

inferior and medialy to zygomatic arch and deep to raumus of mandible

Front 5

anterior wall of ITF

Back 5

posterior surface of maxilla

Front 6

posterior wall of ITF

Back 6

mastoid process
styloid process
tympanic part of temporal bone

Front 7

medial wall of ITF

Back 7

lateral pterygoid plate of sphenoid bone

Front 8

lateral wall

Back 8

ramus of the mandible

Front 9

roof

Back 9

foramen spinosum, foramen ovale, greater wing of sphenoid, infratemporal crest, articular eminence, mandibular fossa

Front 10

4 muscles of mastication

Back 10

temporalis (outside ITF)
Masseter (outside ITF)
lateral pterygoid (inside ITF)
medial Pterygoid (inside ITf)

Front 11

which branchial arch does muscles of masstication develop from?

Back 11

branchial arch 1

Front 12

which cn innervates muscles of mastication

Back 12

branches of V3

Front 13

what's medial pterygoid sling

Back 13

along with masseter, medial pterygoid forms a sling around the mandible. Forms the floor of ITF

Front 14

what muscles does branchial arch 1 give rise to?

Back 14

muscle of mastication
anterior belly of diagastric m
mylohyoid m
tensor veli palatini
tensor tympani
mandible
malleus and incus

Front 15

where does V3 exit from cranial cavity?

Back 15

foramen ovale

Front 16

V3 division in ITF

Back 16

motor root and sensory root combine to form a single trunk and divides into anterior and posterior division.

Front 17

anterior division of V3

Back 17

mostly motor

Front 18

posterior division of v3

Back 18

mostly sensory

Front 19

Trunk branch of V3 (2)

Back 19

meningeal br. Medial pterygoid n

Front 20

Anterior division branch of V3 (4)

Back 20

massteric n, deep temporal, lateral pterygoid, long buccal n.

Front 21

Posterior division branch of V3 (4)

Back 21

auriculotemporal, mylohyoid n, lingual n, inferior alveolar

Front 22

deep temporal n.

Back 22

pass to the deep surface of temporalis m. innervates temporalis

Front 23

deep temporal n. functional components

Back 23

SA BM

Front 24

pterygoid nerves

Back 24

innervate medial and lateral pterygoid muscles

Front 25

pterygoid nerves functional component

Back 25

SA BM

Front 26

masseteric nerve

Back 26

innervate masseter ,ITF --> infratemporal fossa--> mandibular notch and enter deep surface of masseter.

Front 27

masseteric nerve FC

Back 27

SA BM

Front 28

mylohyoid nerve

Back 28

innervates mylohyoid and ant.belly of diagastric m. lies in mylohyoid groove and travels inferior then anteriorly to mylohyoid muscle

Front 29

where does mylohyoid n. branch off from?

Back 29

inferior alveolar nerve

Front 30

mylohyoid nerve FC

Back 30

SA BM

Front 31

long buccal nerve

Back 31

sensory to skin of the cheek over the buccinator muscle, sends penetrating brs to supply mucous membrane of the mouth and part of the gum in same region

Front 32

long buccal nerve FC

Back 32

SA

Front 33

lingual nerve

Back 33

motor innervation of anterior 2/3 of the tongue, joine by chorda tympani(ss fibers to tongue, Ve para pre to submandibular ganglion) parapost lies n between submandibular ganglion and submandibular gland

Front 34

inferior alveolar nerve

Back 34

originally SA BM, **BM branches off as mylohyoid nerve. Inferior alveolar stays purely SA

Front 35

what does inferior alveolar nerve innervate

Back 35

enters mandibular foramen and innv mandibular teeth

Front 36

what does inferior alveolar nerve terminate as

Back 36

mental nerve ( chin and lower lip area)

Front 37

auriculotemporal n

Back 37

splits into 2 roots that surround middle meningeal artery -passes posteriorly to infratemporal fossa, wraps around the neck of mandible and ascends superiorly to the temporal region

Front 38

function component for auriculotemporal nerve

Back 38

SA with Ve para post hitch hiking from otic ganglion

Front 39

location of otic ganglion

Front 40

pathway of Ve parapre for CN9 *to otic ganglion

Back 40

para pre@ inferior salivtory nucleus-tympanic n-tympanic plexus in mid ear-lesser petrosal n-otic ganglion

Front 41

pterygomandibular space

Back 41

clinically defined area in infratemporal fossa

Front 42

boundaries of pterygomandibular space

Back 42

mandibular ramus (laterally) medial pterygoid muscle (medially) lateral pterygoid muscle (superiorly)

Front 43

what's in pterygomandibular space?

Back 43

inferior alveolar nerve
lingual nerve
mylohyoid n
inferior half of the sphenomandibular ligament

Front 44

Inferior alveolar nerve and fiber types/pathways

Back 44

1.inferior alveolar nerve carries BM/SA 2. BM follow mylohyoid nerve 3. after mylohyoid is given off, IAN is purely SA, enters into mandiular foramen--> mandibular canal within the body of the mandible and innervate mandibular teeth 4. mental nervve (SA)

Front 45

Fibers in mental nerve, where does it innervate

Back 45

purely SA, skin of the chin, mucous membrane of lower lip, labial alveolar mucosa, vestibular gingiva of mandibular incisor teeth

Front 46

portion of inferior alveolar nerve that continues to the anterior mandibular teeth

Back 46

incisive nerve

Front 47

IAN injury can result from

Back 47

dental implant
mandibular 3rd molar extractions
root canals
mandibular fractures

Front 48

journey of lingual nerve

Back 48

1.SA br of V3 (ant.2/3 of the tongue) 3. joined by chorda tympani (SS to ant 2/3 and Ve para/pre to submandibular ganglion) 3. VE para/post travel on lingual nerve between submandibular and sublingual gland

Front 49

lingual nerve injury can result in

Back 49

anesthesia (numb tongue)
paresthesia (tingling)
dysesthesia (pain or burning)

Front 50

when do you use IAN nerve block?

Back 50

when multiple teeth in one quadrant require tx. Targets IAN as it travels on the medial aspect of ramus, prior to its entry into mandibular foramen - lingual, mental, incisive nerves are also anesthetized

Front 51

When do you use buccal nerve block?

Back 51

when manipulation of the buccal soft tissue in the mandibular molar region is indicated. Targets buccal nerve as it passes over the anterior aspect of the ramus

Front 52

when do you use mental nerve block

Back 52

when manipulation of buccal soft tissue anteriro to the mental foramen is necessary

Front 53

pterygoid venous plexus is connected to

Back 53

facial vein (via deep facial vein), cavernous sinus, and retromandibular vein (via maxillary veins)

Front 54

location of pterygoid venous plexus

Back 54

between temporalis and pterygoid muscles

Front 55

maxillary artery enters infratemporal fossa via

Back 55

passing posterior to the neck of the mandible

Front 56

3 parts of maxillary artery

Back 56

1st: retromandibular or mandibular, 2nd:pterygoid 3rd:pterygopalatine

Front 57

1st part branches (5)

Back 57

deep auricular, anterior tympanic, middle meningela, accessory meningeal, inferior alveolar

Front 58

deep auricular artery supplies

Back 58

external auditory meatus

Front 59

anterior tympanic artery supplies

Back 59

tympanic membrane

Front 60

middle meningeal artery supplies

Back 60

goes superiorly through foramen spinosum, supplies dura mater and calvaria

Front 61

accessory meningeal artery

Back 61

ascends through foramen ovale and uspply trigeminal ganglian and dura mater

Front 62

inferior alveolar artery supplies

Back 62

travels with alveolar nerve through mandibular foramen and into mandibular canal. Supplies mandible, gingivae (gums), teeth, and floor of mouth

Front 63

inferior alveolar terminates by forming what two arteries?

Back 63

mental artery and incisive artery

Front 64

2nd part branches of maxillary artery

Back 64

1.masseteric a.
2. Deep temporal
3. pterygoid a.
4. buccal a.

Front 65

deep temporal a.

Back 65

accompany deep temporal ns to the deep surface of temporalis

Front 66

masseteric artery

Back 66

accompanies the masseteric n through the mandibular notch to the deep surface of the masseter

Front 67

3rd part branches (6)

Back 67

1.sphenopalatine a
2.infraorbital a.
3. posterior superior a.
4. descending palatine a
5. artery of pterygoid canal
6. pharyngeal canal

Front 68

maxillary artery terminates as

Back 68

sphenopalatine artery

Front 69

what type of joint is TMJ?

Back 69

synovial joint subtype: modified hinge joint

Front 70

articular surface of TMJ involves what three structures

Back 70

head of the mandible, articular tubercle of the temporal bone, mandibular fossa

Front 71

what covers articular surfaces of TMJ?

Back 71

fibrocartilage (not like other synovial joint where it's covered by hyaline cartilage)

Front 72

what divides the joint into two joint cavities or compartments

Back 72

articular disc

Front 73

gliding (translatory)movement is allowed where

Back 73

between articular disc and mandibular fossa @ superior joint cavity

Front 74

rotary (hinge-like)movement is allowed where?

Back 74

between the articular disc and head of the mandible @ inferior joint cavity

Front 75

what arteries supply TMJ

Back 75

superficial temporal, deep auricular, anterior tympanic arteries

Front 76

what nerves innervate TMJ

Back 76

auriculotemporal, masseteric, and deep temporal

Front 77

lateral ligament

Back 77

:temporomandibular ligament : thickening of the ifbrous joint capsule, provide lateral stability to joint, prevent dislocation or displacement of the joint

Front 78

translation

Back 78

head of mandible and articular must move anteriorly on the articular tubercle (articular eminence)

Front 79

opening mouth stpes

Back 79

rotation first -->translation (occur together)

Front 80

TMJ elevation: muscles

Back 80

temporalis (1')
masseter (1')
medial pterygoid (2')

Front 81

TMJ protrusion: muscles

Back 81

lateral pterygoid (1')
medial pterygoid (2')
masseter (2')

Front 82

TMJ retrusion (retraction): muscles

Back 82

temporalis- posterior fibers

Front 83

TMJ depression :muscles

Back 83

lateral pterygoid (1')
gravity (1')
anterior belly of digastric (2')
mylohyoid (2')

Front 84

TMJ lateral excursion (lateral deviation) during grinding and chewing : muscles

Back 84

temporalis, masseter, medial pterygoid, lateral pterygoid

Front 85

Two extrinsic ligaments for TMJ

Back 85

sphenomandibular ligament, stylomandibular ligament

Front 86

Intrinsic ligament for TMJ

Back 86

lateral ligament or temporomandibular ligament

Front 87

functions of extrinsic ligaments

Back 87

provide axis of movement for the mandible at a point near mandibular foramen