Skull, Orbital Bones, CT Flashcards Preview

Visual System Anatomy > Skull, Orbital Bones, CT > Flashcards

Flashcards in Skull, Orbital Bones, CT Deck (97)
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1

where is the anterior and posterior crest of lacrimal sac fossa

anterior: maxillary bone
posterior: lacrimal bone

2

where is the inferior orbital fissure located

lateral wall + floor

3

what bones make up the middle cranial fossa

temporal bones

4

what goes through the foramen spinosum

middle meningeal artery

5

which wall of the orbit is the strongest

lateral wall

6

what stabilize the muscle + prevents overaction of muscles

muscle pulley/check ligament

7

what houses the pituitary gland

sella turcica

8

what does V1 go through

superior orbital fissure

9

what is the optic canal

transmits the ON and ophthalmic artery

10

what bones make up the lateral wall

zygomatic (anterior), greater wing of sphenoid body (posterior)

11

what bones make up the roof of the orbital wall

frontal bone + lesser wing of the sphenoid bone

12

what holds the sinuses

ethmoid air cells

13

what is the orbital plate

medial orbit; holds the orbit on both sides

14

what cells lighten the skull

ethmoid air cells

15

where do tears drain from the eye

fossa of lacrimal sac

16

what is continuous w/ periorbita at margins of orbit

orbital septum

17

what is the thinnest bone

ethmoid orbital plate (lamina papyrace)

18

tenons capsule

surrounds the globe, barrier to infection from globe/eyeball

19

what makes up the medial portion of orbit

ethmoid bone

20

what provides communication between pterygopalatine/ temporal fossa and orbit

inferior orbital fissure

21

what bones make up the medial wall of the orbit

frontal process of maxilla, lacrimal bone, orbital plate of the ethmoid bone

22

placement of visual evoked potential electrodes (VEP):

3 cm above inion, measures electrical potential made by the visual system to ensure info is getting to occipital lobe

-used for VAs or if someone faking VFL

23

frontal sinus

above the eyes in frontal bone

24

what makes up the body central portion of brain

sphenoid body

25

what makes up the posterior fossa

occipital lobe + cerebellum

26

foramen magnum

the hole in the base of the skull through which the spinal cord passes.

27

what forms the posterior fossa

occipital bone

28

what drains the tears into the nose

nasolacrimal canal - located in lower portion

29

how can there be an infection in ethmoid

bacteria can eat through bone into orbit

30

what goes through the SOF above the CTR

lacrimal nerve, frontal nerve, trochlear nerve, superior ophthalmic vein --> drains globe