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  1. each orbit is what shaped
  2. what is the rim of the orbit that corresponds to the outer circular portion of the cone called
  3. what is the posterior portion of the cone called
  4. the optic nerve passes through what
    optic foramen
  5. each orbit projects superiorly how many degrees and how many towards it s long axis
    • 30 superior 
    • 37 to long axis
  6. the circular base of the orbit is composed of what three bones
    frontal maxilla zygoma
  7. the medial wall of the orbit is  formed by what bone
    lacrimal bone
  8. what bones make up the posterior orbit
    sphenoid and ethmoid and small portion of the palatine bone
  9. what are the 7 bones that make up the orbit include facial and cranial
    • cranial: frontal sphenoid ethmoid
    • Facial: maxilla 
    • zygoma lacrimal palatine
  10. what is a cleft opening between the greater and lesser wings of sphenoid bone
    superior orbital fissure
  11. what is the opening located between the maxilla zygomatic and greater wing of the sphenoid
    inferior orbital fissure
  12. where is the optic foramen located 
    what nerve passes through here
    it is a small hole located on sphenoid bone that is posterior at apex of the cone shaped orbit 

    optic nerve 2
  13. cranial nerves 3-6 go through what opening and what do they control
    • superior orbital fissure
    • movement of eye and eyelid
  14. cranial nerve 5 passes through what area and does what
    • inferior orbital fissure 
    • controls sensory innervation of cheek nose upper lip and teeth
  15. what is the small root of bone that separates the superior orb fissure from the optic canal is known as the
    sphenoid strut
  16. blowout fx
    a fx of the floor of the orbit caused by an object striking the eyes straight on
  17. tripod fx
    is caused by a blow to the cheek resulting in fx of the zygoma in three places
  18. le fort fx
    are severe bilateral horizontal fx of the maxillae that may result in an unstable detached fragment
  19. contrecoup fx
    to one side of a structure that is caused by an impace on the opposite side
  20. when performing the rhese method or the parietoorbital oblique projection what would you do first to patient
    position pt so that he/she is prone and line aml perp to IR
  21. how much rotation is needed for rhese method 
    what is the angle formed between the msp and plane of IR
    • 37 deg toward affected side 
    • 53 deg
  22. what is the large chamber within the mastoid portion
  23. what is the thin plate of bone that forms the roof of the antrum aditus and attic area of the tympanic cavity
    tegmen tympani
  24. vibrations are picked up by what structure of the ear
  25. the optic foramen is projected where in the rhese mthod
    lower outer quadrant
  26. encephalitis
    infection of the brain
  27. what are the three small bones that are prominent structures within the ear called
    what are there names
    • auditory ossicles
    • malleus
    • incus
    • stapes
  28. the internal ear contains essential sensory apparatus for bothe _____ and ______
    HEARING ANd equilibrium
  29. what are the three parts of the bony labrynth
    • cochlea  sense of hearing
    • vestibule and sem circular canals = equilibrium
Card Set:
2014-12-08 02:46:16

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