Infratemporal Fossa

Front 1

Infratemporal Fossa Boundaries:
Anterior Wall

Back 1

posterior (infratemporal) surface of the maxilla

Front 2

Infratemporal Fossa Boundaries:
Posterior Wall

Back 2

-styloid process
-mastoid process
-tympanic part of temporal bone

Front 3

Infratemporal Fossa Boundaries:
Medial Wall

Back 3

lateral pterygoid plate of sphenoid bone

Front 4

Infratemporal Fossa Boundaries:
Lateral Wall

Back 4

ramus of the mandible

Front 5

Back 5

1. greater wing of sphenoid (forms most of the roof
2. foramen ovale
3. foramen spinosum
4. mandibular fossa*
5. articular eminence*
6. infratemporal crest
*on squamous part of temporal bone

Front 6

Back 6

1. neck
2. angle
3. ramus
4. body
5. mental foramen
6. mental protuberance
7. lingula
8. coronoid process
9. mandibular foramen
10. condyle
11. pterygoid fovea

Front 7

Back 7

1. mylohyoid groove
2. submandibular fossa
3. mylohyoid line
4. genial tubercules
5. sublingual fossa
6. mandibular incisure or notch

Front 8

Temporalis

Back 8

I: deep temoporal n. (V3)
A: elevates mandible; posterior fibers retract the mandible; ipsilateral excursion

Front 9

Masseter

Back 9

I: n. to masseter (V3)
A: elevates mandible; superficial fibers protrude the mandible; ipsilateral excursion

Front 10

Lateral Pterygoid M.

Back 10

I: ns. to lateral pterygoid (V3)
A: protrudes mandible; translates mandibular condyle during depression; contralateral excursion
*runs horizontally

Front 11

Medial Pterygoid M.

Back 11

I: n. to medial pterygoid (V3)
A: elevates mandible; assists in protrusion; contralateral excursion
*runs vertically

Front 12

Infratemporal Fossa Boundaries:
Floor

Back 12

"sling" around mandible formed by the masseter and the medial pterygoid m.

Front 13

V3 Branches:
-Trunk Branches?
-Anterior Div. Branches?
-Posterior Div. Branches?

Back 13

-trunk: meningeal br.; medial pterygoid n.
-anterior div: masseteric n.; deep temporal ns.; lateral pterygoid n.; long buccal n.
-post. div: auriculotemporal n.; lingual n.; inferior alveolar n. -> mylohyoid n.

Front 14

Deep Temporal Ns.
-Type of Branch?
-Innervate?
-Fibers?

Back 14

-anterior div. br.
-to deep surface of temporalis m.
-SA; BM

Front 15

Ns. to the Lateral & Medial Pterygoid
-Type of Branch?
-Innervate?
-Fibers?

Back 15

-medial pterygoid n: trunk br.
-lateral pterygoid n.: anterior div. br.
-to M&L pterygoid ms.
-SA; BM

Front 16

Masseteric N.
-Type of Branch?
-Innervates?
-Route
-Fibers?

Back 16

-anterior div. br.
-to masseter
-route: infratemporal fossa-> mandibular notch-> deep surface of masseter
-SA; BM

Front 17

Mylohyoid N.
-Type of Branch?
-Innervates?
-Route
-Fibers?

Back 17

-off inf. alveolar n. from post. div. br.
-to mylohyoid and ant. belly of digastric
-route: inf alv. n.-> mylohyoid groove-> mylohyoid m.
-SA; BM

Front 18

Long Buccal N.
-Type of Branch?
-Innervates?
-Route?
-Fibers?

Back 18

-anterior div. br.
-to skin of the cheek; mucous mb of mouth and part of gums in same region
-pierces buccinator but doesn't innervate it
-SA

Front 19

Lingual N.
-Type of Branch?
-Innervates?
-Fibers at Different Points?

Back 19

-post. div. br.
-to anterior 2/3 of tongue
-SA->( chorda tympani joins)-> SA, SS to anterior 2/3 of tongue & VE-para/pre to submandibular ganglion-> (after submand. g.)-> SA, SS, VE-para/post to sublingual gland

Front 20

Inferior Alveolar N.
-Type of Branch?
-Innervates?
-Route/Fibers at Different Points?

Back 20

-post div. br. (post. to lingual n.)
-to mandibular teeth; chin and lower lip area
-SA, BM-> (mylohyoid leaves)-> only SA-> mandibular foramen-> mandibular canal-> (innervates mand. teeth)-> mental foramen-> becomes mental n. (innervates chin, lower lip, labial alveolar mucosa, mand. incisor teeth [incisive n.])

Front 21

Auriculotemporal N.
-Type of Branch?
-Innervates?
-Route?
-Fibers?

Back 21

-post. div. br.
-to parotid gland; skin of temporal region
-splits into 2 roots surrounding middle meningeal a.-> posteriorly thru infratemporal fossa-> around neck of mandible-> ascends to temporal region
-SA; hitchhiking VE-para/post from otic ganglion (*after parotid gland, only SA)

Front 22

Pterygomandibular Space
-Boundaries
-Contents

Back 22

-boundaries: medial aspect of mand. ramus (laterally); medial pterygoid m. (medially); lateral pterygoid m (superiorly)
-contents: inferior alveolar n.; lingual n.; mylohyoid n.; inf. 1/2 of sphenomandibular lig

Front 23

Inferior Alveolar Nerve (IAN) Block
-Region Involved?
-Target?

Back 23

-multiple teeth in one quadrant
-target nerve as it travels on medial aspect of ramus before it enters mand. foramen

Front 24

Buccal Nerve Block
-Region Involved?
-Target?

Back 24

-buccal soft tissue in mand. molar region
-target buccal n. as it passes over ant. aspect of ramus

Front 25

Mental N. Block
-Region Involved?

Back 25

buccal soft tissue anterior to mental foramen

Front 26

Pterygoid Venous Plexus
-Location?
-Connected to?

Back 26

-located b/w temporalis and pterygoid ms.
-connected to: cavernous sinus; facial v (via deep facial v.); retromandibular v. (via maxillary vs.)

Front 27

Maxillary Artery Branches:
1st (Retromandibular) Part

Back 27

-deep auricular a.
-anterior tympanic a.
-middle meningeal a.
-accessory meningeal a.
-inferior alveolar a.

Front 28

Deep Auricular A.
-Supplies?

Back 28

supplies external auditory meatus

Front 29

Anterior Tympanic A.
-Supplies?

Back 29

supplies tympanic mb.

Front 30

Middle Meningeal A.
-Route?
-Supplies?

Back 30

-route: superiorly thru foramen spinosum surrounded by 2 roots of auriculotemporal n
-supplies dura mater and calvaria

Front 31

Accessory Meningeal A.
-Route?
-Supplies?

Back 31

-route: ascends thru foramen ovale
-supplies trigeminal ganglion and dura mater

Front 32

Inferior Alveolar A.
-Route?
-Supplies?

Back 32

-route: travels w/ inf. alveolar n. thru mandibular foramen and into mand. canal; terminates as mental a. and incisive a.
-supplies mandible, gums, teeth, floor of mouth

Front 33

Maxillary Artery Branches:
2nd (Pterygoid) Part

Back 33

-deep temporal as.
-pterygoid as.
-masseteric a.
-buccal a.
*these are all "muscular branches"

Front 34

Deep Temporal As.
-Supplies?

Back 34

accompanies the deep temporal ns. to the deep surface of the temporalis

Front 35

Masseteric A.
-Route?
-Supplies?

Back 35

-route: accompanies masseteric n. thru mand. notch
-supplies deep surface of masseter