Infratemporal fossa + TMJ Flashcards
What does the fibrocartilagenous disc do in the TMJ
has ant and post bands that split it up into sup and inf cavities
- sup( pro-retrution)
- inf(ele-depression)
what n is sensory for TMJ
Auriculotemporal
what ligs support the the TMJ (3)
- lat lig-enhances fibrous capsul
- stylomandibular
- sphenomandibular (from sphenoid spine)
what arteries are deep to the sphenomandibular lig
middle meningeal artery and maxillary artery
what happens at the tmj when you open your mouth wide
mandible protracts and depresses
what is lock jaw due to
excessive contraction of the lat pterygoid, ant tubercle has ant dislocation
borders of the infratemporal fossa
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
where does the mandibular div of CNv exit
foramen ovale to infratemporal fossa
what are the terminal nerves of the sensory component of CNv
Buccal
Auriculotemporal
Lingual (ant tounge)
what nerves are under the lat pterygoid
bucal, lingial, inf alveolar, corda typani
where is the masseneric n located
between greater wing and sup head of lat pterygoid
Where is the buccal n located
merges thru the superior head of lat pterygoid
where does the auriculotemporal nerve emerge
between auricle and tmj post to it
Where does the lingual nerve and inf alveolar nerve emerge
inf border of inf head of lat pterygoid and descends on top of medial pterygoid
3 parts of the maxillary artery and what is it a branch of
branch of ext carotid
1- mandibular
- Pterygoid
- Pterygopalantine
what does the inf alveolar n inn (sensory + motor)
sensory- lower teeth, skin of lower lip
motor- mylohyoid, ant belly of digastric
what does the auriculotemporal n innervate (sensory and parasympathetic)
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
what nerve supplies the post helix and lobuble and antihelix
Great auricular n (C2,C3)
What nerve supplies ant helix, crus and tragus
Auriculotemporal (CNV3)
What nerve supplies the concha, ext aucustic meatus, typanic membran
vagus (CNX)
what nerve supples just the concha
CN7 (facial)
What does the buccal n supply
skin over ant buccinator
what does the menigeal recurrent n supply
reenters cranium thru foramen spinosum and supplies dura mater
Path of lingual n
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
what is the sensory, special and parasympathetic inn of the lingual n
sensory- floor of mouth, lingual gingivae, ant 2/3 of tounge
Special- ant 2/3 of taste buds
Parasympathetic- submandibular, sublingual, intralingual glands
