Infratemporal fossa + TMJ

Question 1

What does the fibrocartilagenous disc do in the TMJ

Answer 1

has ant and post bands that split it up into sup and inf cavities

• sup( pro-retrution)
• inf(ele-depression)

Question 2

what n is sensory for TMJ

Answer 2

Auriculotemporal

Question 3

what ligs support the the TMJ (3)

Answer 3

1. lat lig-enhances fibrous capsul
2. stylomandibular
3. sphenomandibular (from sphenoid spine)

Question 4

what arteries are deep to the sphenomandibular lig

Answer 4

middle meningeal artery and maxillary artery

Question 5

what happens at the tmj when you open your mouth wide

Answer 5

mandible protracts and depresses

Question 6

what is lock jaw due to

Answer 6

excessive contraction of the lat pterygoid, ant tubercle has ant dislocation

Question 7

borders of the infratemporal fossa

Answer 7

sup- greater wing
ant-infratemporal surface of maxillary body
lat- mandible ramus
inf- medial pterygoid attachment to mandible
post-typanic plate
med- lat plate of pterygoid process

Question 8

where does the mandibular div of CNv exit

Answer 8

foramen ovale to infratemporal fossa

Question 9

what are the terminal nerves of the sensory component of CNv

Answer 9

Buccal
Auriculotemporal
Lingual (ant tounge)

Question 10

what nerves are under the lat pterygoid

Answer 10

bucal, lingial, inf alveolar, corda typani

Question 11

where is the masseneric n located

Answer 11

between greater wing and sup head of lat pterygoid

Question 12

Where is the buccal n located

Answer 12

merges thru the superior head of lat pterygoid

Question 13

where does the auriculotemporal nerve emerge

Answer 13

between auricle and tmj post to it

Question 14

Where does the lingual nerve and inf alveolar nerve emerge

Answer 14

inf border of inf head of lat pterygoid and descends on top of medial pterygoid

Question 15

3 parts of the maxillary artery and what is it a branch of

Answer 15

branch of ext carotid

1- mandibular

2. Pterygoid
3. Pterygopalantine

Question 16

what does the inf alveolar n inn (sensory + motor)

Answer 16

sensory- lower teeth, skin of lower lip

motor- mylohyoid, ant belly of digastric

Question 17

what does the auriculotemporal n innervate (sensory and parasympathetic)

Answer 17

sensory- skin of post temporal fossa, parotid sheeth, helix of auricle, skin of ext auditory meatus, TMJ

parasympathetic- from otic ganglion forms parotid br that supplies parotid gland

Question 18

what nerve supplies the post helix and lobuble and antihelix

Answer 18

Great auricular n (C2,C3)

Question 19

What nerve supplies ant helix, crus and tragus

Answer 19

Auriculotemporal (CNV3)

Question 20

What nerve supplies the concha, ext aucustic meatus, typanic membran

Answer 20

vagus (CNX)

Question 21

what nerve supples just the concha

Answer 21

CN7 (facial)

Question 22

What does the buccal n supply

Answer 22

skin over ant buccinator

Question 23

what does the menigeal recurrent n supply

Answer 23

reenters cranium thru foramen spinosum and supplies dura mater

Question 24

Path of lingual n

Answer 24

Emerges from lower part of lat pterygoid to surface of med pterygoid, goes deep to mylogyoid, goes below submandicular gland and goes up to enter tongue

Question 25

what is the sensory, special and parasympathetic inn of the lingual n

Answer 25

sensory- floor of mouth, lingual gingivae, ant 2/3 of tounge

Special- ant 2/3 of taste buds

Parasympathetic- submandibular, sublingual, intralingual glands