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What goes through the pterygomaxillary fissure and pterygopalatine fossa?
- maxillary artery and branches
- V2
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What foramina are in the sphenoid?
- foramen ovale (V3)
- foramen spinosum (middle meningeal artery)
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What composes the TMJ?
articular disk, articular cartilage (hyaline), 2 synovial joint cavities, fibrous capsule, articular tubercle, articular eminence
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What provides innervation to TMJ?
auriculotemporal nerve (branch of V3)
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What are the movements of the TMJ?
- (gliding) protrusion, retrusion
- (rotation) elevation, depression
- lateral displacement
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What are 2 disorders assoc w/ TMJ?
- dislocation
- extreme lateral displacement
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Where does the temporalis originate?
temporal fossa and fascia
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Where does the temporalis insert?
coronoid process, ant ramus, temporal crest
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What does the temporalis do?
- elevate jaw
- retract mandible
- clench teeth
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Where does the masseter originate?
zygomatic arch
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Where does the masseter insert?
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What does the masseter do?
- elevates mandible
- clench teeth
- protrudes mandible
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Where does the lateral pterygoid originate?
sphenoid's lateral pterygoid plexus
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Where does the lateral pterygoid insert?
- condylar neck
- TMJ capsule
- articular disk
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What does the lateral pterygoid do?
- protract
- depress
- pulls disc forward
- side-to-side
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Where does the medial pterygoid originate?
- later pterygoid plexus (medial surface)
- maxillary tubercle
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Where does the medial pterygoid insert?
medial ramus
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What does the medial pterygoid do?
- elevate
- side-to-side
- protraction
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What structures go btw the pterygoid muscles?
lingual nerve, inferior alveolar nerve, chorda tympani nerve, pterygoid plexus, sphenomandibular ligament, second part of maxillary artery
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What other muscles besides lateral pterygoid contribute to depressing the mandible?
suprahyoid, infrahyoid, (gravity)
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What does the buccal nerve carry?
(V3), aff to skin of cheek and mouth's mucous mem
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Where is the buccal nerve?
btw 2 heads of lateral pterygoid muscle
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What does the buccal nerve pierce?
buccinator (innervated by CN7)
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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
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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
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Where is the pterygoid plexus?
both sides of lat pt muscle
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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
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