Infratemporal Fossa, Head And Neck, Brs 344-352

Front 1

Contents of the Infratemporal Fossa

Back 1

MM: temporalis, lateral and medial pterygoid
VV: pterygoid plexus of veins, maxillary artery and branches
NN: mandibular nerve + branches, chorda tympani, otic ganglion

Front 2

Boundaries of Infratemporal Fossa

Back 2

Anterior: posterior surface, maxilla
Posterior: styloid process
Medial: lateral pterygoid plate
Lateral: ramus and coronoid process of mandible
Anterior: greater wing of sphenoid and infratemporal crest

Front 3

Contents of Temporal Fossa

Back 3

MM: temporalis
NN: deep temporal nerves, auriculotemporal nerve
VV: deep & superficial temporal vessels

Front 4

Boundaries of Temporal Fossa

Back 4

Anterior: zygomatic process of frontal bone, zygomatic bone
Posterior: temporal line
Superior: temporal line
Lateral: zygomatic arch
Inferior: infratemporal crest
Floor: parts of frontal, parietal, temporal, greater wing of sphenoid

Front 5

Mandibular division of Trigeminal Nerve (V3) exits the skull via the...

Back 5

FORAMEN OVALE

Front 6

Motor Innervation of V3 (Mandibular Nerve)

Back 6

tensor veli palatini, tensor tympani, mm of mastication (temporalis, lateral and medial pterygoid, masseter), anterior belly of digastric, mylohyoid

Front 7

Sensory innervation of V3 (mandibular)

Back 7

lower teeth, lower face below the lower lip and mouth

Front 8

Branches of V3 (mandibular nerve)

Back 8

Meningeal
Muscular (to mm of mast)
Buccal
Auriculotemporal
Lingual
Inferior Alveolar

Front 9

Meningeal Branch of V3 enters the cranial through the...

Back 9

FORAMEN SPINOSUM (along with the middle meningeal artery from the maxillary artery)

Front 10

Muscular Branch of V3

Back 10

branches into deep temporal, medial and lateral pterygoid, masseter to supply mm of mastication

Front 11

Buccal Nerve - path & innervation

Back 11

descends btw two head of lateral pterygoid to penetrate buccal mm to supply mucous membranes of cheek and gums

Front 12

Auriculotemporal Nerve of V3 encircles what artery?

Back 12

Middle Meningeal a.

Front 13

What type of fibers does the auriculotemporal nerve carry?

Back 13

GSA: sensory from TM joint
GVE: postganglionic parasympathetic and sympathetic to parotid gland

Front 14

Describe the pathway of Lingual n. (what nerve joins it? what ganglion does it supply with what kind of fibers?)

Back 14

descends deep to the latera pterygoid where it joins the chorda tympani (from CN VII), which conveys parasympathetic preganglionic to submandibular gland

Front 15

Inferior Alveolar - pathway

Back 15

passes deep to lateral pterygoid btw sphenomandibular ligament and ramus of mandible;
enters MANDIBULAR CANAL via MANDIBULAR FORAMEN to supply tissues of chin and lower teeth and gum

Front 16

Otic Ganglion - location?

Back 16

in infratemporal fossa, just below the foramen ovale btw the mandibular nerve and tensor veli palatini

Front 17

Otic Ganglion
1) what fibers does it receive along what nerves?
2) where do the fibers go after synapsing here?

Back 17

1) Receives preganglionic parasympathetic fibers that run in the glossopharyngeal nerve, tympanic plexus and lesser petrosal nerve
2) After synapsing, the postganglionic fibers run in the auriculotemporal nerve to innervate the PAROTID GLAND

Front 18

Maxillary Artery arises from...

Back 18

EXTERNAL CAROTID ARTERY

Front 19

Three Parts of the Maxillary Artery

Back 19

Mandibular part, Pterygoid part, Pterygopalatine Part

Front 20

Branches of the Mandibular part of the Maxillary artery

Back 20

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

Front 21

branches of Pterygoid part of Maxillary artery

Back 21

branches supply the mm of mastication:
anterior & posterior deep temporal,
pterygoid,
masseteric,
buccal

Front 22

Pterygopalatine Part of Maxillary artery (pathway, branches)

Back 22

Runs btw two head of lateral pterygoid through pterygomaxillary fissure to pterygopalatine fossa;
Branches:
- Posterior-superior alveolar
- Infraorbital (--> ant & mid sup alveolar)
- descending palatine
- artery of pterygoid canal
- pharyngeal artery
- sphenopalatine artery

Front 23

What artery may be damaged that could result in a nosebleed?

Back 23

Sphenopalatine (branch of maxillary artery)

Front 24

Pterygoid Plexus of Veins (location, tributaries)

Back 24

lies of the lateral surface of the medial pterygoid muscle,
receives veins corresponding to maxillary artery & drains into maxillary vein

Front 25

What venous sinus & veins communicates with the Pterygoid Plexus? Through which vessels?

Back 25

Pterygoid venous plexus communicates with CAVERNOUS SINUS via emissary veins, the inferior opthalmic vein and the facial vein

Front 26

the Retromandibular vein is formed by...

Back 26

the superficial temporal and maxillary veins

Front 27

The Retromandibular vein drains into...

Back 27

anterior part --> joins facial to form common facial;
posterior part --> joins posterior auricular to form External Jugular vein

Front 28

Parotid Gland is located in what space?

Back 28

Retromandibular space between ramus of the mandible in front and mastoid process and SCM behind

Front 29

Parotid Gland receives innervation from where?

Back 29

lesser petrosal of glossopharyngeal nerve carries parasympathetic preganglionic to otic ganglion; auriculotemporal carries postganglionic from otic ganglion to Parotid Gland...

Front 30

What duct is associated with the parotid gland? Where does it open?

Back 30

Stensen's duct - crosses masseter, pierces buccinator, opens into oral cavity opposite the second upper molar tooth

Front 31

Surgical removal of the parotid gland may damage which nerve?

Back 31

Facial

Front 32

Temporomandibular Joint - what type of joint is it?

Back 32

combined gliding and hinge type of SYNOVIAL JOINT

Front 33

What ligaments reinforce the TMJ?

Back 33

lateral (temporamandibular) ligament which extends from zygoma to neck of mandible;
SPHENOMANDIBULAR LIG. which extends from spine of sphenoid bone to lingula of the mandible

Front 34

What nerve innervated the TMJ?

Back 34

auriculotemporal
(and masseteric branch)
....both from Mandibular nerve

Front 35

Pterygomandibular raphe

Back 35

ligamentous band btw buccinator m and superior pharyngeal constrictor

Front 36

Stylomandibular ligament - where is it? what does it separate?

Back 36

extends from styloid process to posterior border of the ramus of the mandible,
SEPARATES PAROTID GLAND FROM SUBMANDIBULAR