Infraorbital region

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Author:
embryo
ID:
99076
Filename:
Infraorbital region
Updated:
2011-08-30 18:59:39
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anatomy infraorbital
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Description:
MS1/Mod 1: anatomy and embryology; infraorbital region
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  1. What goes through the pterygomaxillary fissure and pterygopalatine fossa?
    • maxillary artery and branches
    • V2
  2. What foramina are in the sphenoid?
    • foramen ovale (V3)
    • foramen spinosum (middle meningeal artery)
  3. What composes the TMJ?
    articular disk, articular cartilage (hyaline), 2 synovial joint cavities, fibrous capsule, articular tubercle, articular eminence
  4. What provides innervation to TMJ?
    auriculotemporal nerve (branch of V3)
  5. What are the movements of the TMJ?
    • (gliding) protrusion, retrusion
    • (rotation) elevation, depression
    • lateral displacement
  6. What are 2 disorders assoc w/ TMJ?
    • dislocation
    • extreme lateral displacement
  7. Where does the temporalis originate?
    temporal fossa and fascia
  8. Where does the temporalis insert?
    coronoid process, ant ramus, temporal crest
  9. What does the temporalis do?
    • elevate jaw
    • retract mandible
    • clench teeth
  10. Where does the masseter originate?
    zygomatic arch
  11. Where does the masseter insert?
    • ramus
    • coronoid process
  12. What does the masseter do?
    • elevates mandible
    • clench teeth
    • protrudes mandible
  13. Where does the lateral pterygoid originate?
    sphenoid's lateral pterygoid plexus
  14. Where does the lateral pterygoid insert?
    • condylar neck
    • TMJ capsule
    • articular disk
  15. What does the lateral pterygoid do?
    • protract
    • depress
    • pulls disc forward
    • side-to-side
  16. Where does the medial pterygoid originate?
    • later pterygoid plexus (medial surface)
    • maxillary tubercle
  17. Where does the medial pterygoid insert?
    medial ramus
  18. What does the medial pterygoid do?
    • elevate
    • side-to-side
    • protraction
  19. What structures go btw the pterygoid muscles?
    lingual nerve, inferior alveolar nerve, chorda tympani nerve, pterygoid plexus, sphenomandibular ligament, second part of maxillary artery
  20. What other muscles besides lateral pterygoid contribute to depressing the mandible?
    suprahyoid, infrahyoid, (gravity)
  21. What does the buccal nerve carry?
    (V3), aff to skin of cheek and mouth's mucous mem
  22. Where is the buccal nerve?
    btw 2 heads of lateral pterygoid muscle
  23. What does the buccal nerve pierce?
    buccinator (innervated by CN7)
  24. 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
  25. 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
  26. Where is the pterygoid plexus?
    both sides of lat pt muscle
  27. 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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