Parotid, Temporal and TMJ

Question 1

Structures passing through parotid gland

Answer 1

External carotid a, retromandibular v, facial n

Question 2

What is the tough capsule surrounding the parotid gland derived from?

Answer 2

investing layer of deep cervical fascia

Question 3

What two veins from the retromandibular v?

Answer 3

superficial temporal and maxillary vv

Question 4

What 2 branches does the ECA split into?

Answer 4

superficial temporal and maxillary a

Question 5

What innervates all mm of facial expression?

Answer 5

facial n

Question 6

Contents of temporal fossa

Answer 6

temporal fat pad, temporalis m, masseter m, neurovasculature

Question 7

mandibular division of trigeminal n branches

Answer 7

anterior: masseteric, deep temporal, buccal, lateral pterygoid nn
Posterior: auriculotemporal n, lingual and inferior alveolar na
muscular branches: medial pterygoid, tensor veli palatini, tensor tympani
meningeal branch

Question 8

What does auriculotemporal n travel with?

Answer 8

superficial temporal a and v

Question 9

What provides sensory innervation to TMJ and lateral scalp?

Answer 9

auriculotemporal n

Question 10

What carries parasympathetic fibers from CN IX into parotid gland?

Answer 10

auriculotemporal n

Question 11

Which n passes sup to lat pterygoid m and deep to temporalis m?

Answer 11

ant and post deep temporal nn

Question 12

Borders of Infratemporal fossa

Answer 12

lateral - ramus of mand
medial - lateral pterygoid plate
ant -maxilla
post - tympanic plate, mastoid and styloid processes
roof - int surface of greater wing of sphenoid, temporal bone

Question 13

Where does the infra temporal fossa end?

Answer 13

where medial pterygoid m attaches to mandible

Question 14

What type of innervation is the ant branch of V3?

Answer 14

mainly motor (small), 1 sensory branch (buccal n)

Question 15

What type of innervation is the post branch of V3?

Answer 15

mainly sensory (larger), 1 motor (mylohyoid n)

Question 16

What does chorda tympani supply?

Answer 16

parasympathetics to lower 2 salivary glands, joins lingual n and carries taste fibers to ant 2/3 of tongue

Question 17

What are the actions of the TMJ?

Answer 17

hinge and gliding actions

Question 18

What are the movements of TMJ?

Answer 18

• protrusion by lat and med pterygoids
• retraction (post fibers of temporalis, deep part of masseter and geniohyoid and digastric mm)
• elevation (temporalis, masseter, med pterygoid)
• depression (gravity, digastric, geniohyoid and mylohyoid mm)

Question 19

Accessory ligaments of TMJ

Answer 19

stylomandibular and sphenomandibular ligaments

Question 20

Where does the stylomandibular ligament extend?

Answer 20

styloid process to post border of mandibular ramus

Question 21

Where does sphenomandibular ligament extend?

Answer 21

spine of sphenoid bone to lingual of mandible

Question 22

What does stylomandibular ligament separate?

Answer 22

parotid and submandibular glands

Question 23

What is separates sphenomandibular ligament from capsule?`

Answer 23

maxillary a and auriculotemporal n

Question 24

What does the masticator space include?

Answer 24

infra temporal space, temporal space, masseteric space and pterygomandibular space

Question 25

What are the arteries of the temporal fossa?

Answer 25

middle temporal a, superficial temporal and deep temporal aa

Question 26

What are the contents of the infra temporal fossa?

Answer 26

temporalis, medial and lateral pterygoid mm, maxillary a and v and brs, pterygoid venous plexus, V3, V2, chorda tympani of CN VII, otic ganglion, and lesser petrosal n

Question 27

Where does the temporal fossa continue into?

Answer 27

infra temporal fossa

Question 28

Why is the TMJ concavoconvex?

Answer 28

to fit articular tubercle and mandibular fossa