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What goes through the pterygomaxillary fissure and pterygopalatine fossa?
- maxillary artery and branches
What foramina are in the sphenoid?
- foramen ovale (V3)
- foramen spinosum (middle meningeal artery)
What composes the TMJ?
articular disk, articular cartilage (hyaline), 2 synovial joint cavities, fibrous capsule, articular tubercle, articular eminence
What provides innervation to TMJ?
auriculotemporal nerve (branch of V3)
What are the movements of the TMJ?
- (gliding) protrusion, retrusion
- (rotation) elevation, depression
- lateral displacement
What are 2 disorders assoc w/ TMJ?
- extreme lateral displacement
Where does the temporalis originate?
temporal fossa and fascia
Where does the temporalis insert?
coronoid process, ant ramus, temporal crest
What does the temporalis do?
- elevate jaw
- retract mandible
- clench teeth
Where does the masseter originate?
Where does the masseter insert?
What does the masseter do?
- elevates mandible
- clench teeth
- protrudes mandible
Where does the lateral pterygoid originate?
sphenoid's lateral pterygoid plexus
Where does the lateral pterygoid insert?
- condylar neck
- TMJ capsule
- articular disk
What does the lateral pterygoid do?
- pulls disc forward
Where does the medial pterygoid originate?
- later pterygoid plexus (medial surface)
- maxillary tubercle
Where does the medial pterygoid insert?
What does the medial pterygoid do?
What structures go btw the pterygoid muscles?
lingual nerve, inferior alveolar nerve, chorda tympani nerve, pterygoid plexus, sphenomandibular ligament, second part of maxillary artery
What other muscles besides lateral pterygoid contribute to depressing the mandible?
suprahyoid, infrahyoid, (gravity)
What does the buccal nerve carry?
(V3), aff to skin of cheek and mouth's mucous mem
Where is the buccal nerve?
btw 2 heads of lateral pterygoid muscle
What does the buccal nerve pierce?
buccinator (innervated by CN7)
What does chorda tympani nerve carry?
- (joins lingual, V3)
- aff from geniculate ganglion to taste on ant 2/3 of tongue
- pre-PS from sup salv nuc to submandibular ganglion
What are the three parts of the maxillary artery?
- 1. deep to ramus: middle meningeal artery, inferior alveolar artery
- 2. superficial/deep to lat pt muscle: muscular branches
- 3. into/over pterygomax fissure into pterygopalatine fossa: infraorbital artery, post sup alveolar artery, sphenopalatine artery, descending palatine artery
Where is the pterygoid plexus?
both sides of lat pt muscle
What does the pterygoid plexus do?
communicates to cavernous sinus (via emissary veins through FO and foramen vesalius) and deep facial vein
drains maxillary vein to join superficial temporal vein and form retromandibular vein