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Head and Neck Anatomy Practice Questions > Eye and Orbit > Flashcards

Flashcards in Eye and Orbit Deck (62):
1

what nerve gives sensory to skin over parotid duct

auriculotemporal of V3

2

what nerve passes through foramen rotundum

V2

3

what carries postgang psy fibers to parotid gland?

auriculotemporal of V3

4

what innervates occipitalis m.?

posterior auricular branch of facial nerve (VII)

5

which cranial nerves contain GVE fibers

III, VII, IX (otic ganglion) , X

6

do we have drgs for cranial nerves?

no

7

innervation path for parotid

CNIX exit jugular foramen, tympanic branch goes back up through the tympanic canaliculi to middle ear and form a plexus. part of those are sensory to the middle ear, but the ones we want go up through the roof of middle ear (tegman tympani) they cross the middle cranial fossa as the lesser petrosal nerve. it goes down through foramen ovale and synapse in otic ganglion

8

what bone is the origin of the levator anguli oris

maxilla

9

what bone contains stylomastoid f.

temporal

10

which bone has the groove for lesser petrosal n.

temporal

11

what CN that innervate the face contain SVE fibers

CN V3 (muscles of mastication. nerve of first pharyngial arch), VII (muscles of facial expression. nerve of second pharyngial arch)

12

which blood vessel most often impinges on CN V to cause trigeminal neuralgia?

superior cerebellar a.

13

are we gonna study visual pathways?

nope. just anatomy of the eye, no retina

14

where do eye boogies get stuck?

medial angle of the eye in lacrimal caruncle and lacrimal lake. maybe semilunar conjunctival fold if its a big one .

15

what bones are in the medial angle of the orbit?

lacrimal bone (with lacrimal groove), orbital plate of ethmoid bone, tiny piece of palatine bone, orbital surface of maxilla

16

what nerves are intimately related to the orbit

V1, V2, III

17

what bone parts make the superior orbital fissure?

greater and lesser wings of sphenoid

18

what bone parts make the inferior orbital fissure?

greater wing of sphenoid and orbital surface of maxilla (which has a groove for V2)

19

what sinus lies on either side of the body of sphenoid

cavernous sinus (for blood)

20

what are some foramina that are totally within the sphenoid?

foramen rotundum, pterygoid canal, foramen ovale, foramen spinosum

21

how does the central artery of retina get to the eye?

it travels WITHIN the optic nerve

22

what does the tarsal plate do?

its like the skeleton of the upper and lower lid that attaches to the levator palpegrae superiorism,, superior tarsal m. (aka muellers muscle innervated by ANS)

23

what innervates levator palpebrae superioris m

superior branch of occulomotor (III)

24

what does the lacrimal gland wrap around?

tendon of levator palpebrae superioris

25

what walls off the anterior portion of the orbit from the outside world?

orbital septum (from periosteum of the bone). its on inferior and superior portions of the orbit

26

lacrimal nerve is from which cranial nerve

V1,

27

what is the conjunctival fornix?

where the conjunctiva from the eyelid and eyeball meet

28

how does a tear get to your nose?

punctiva to canaliculi

29

PSy of CN __ innervate the lacrimal gland. How?

VII. go to internal acoustic meatus thru geniculate ganglion (NO SYNAPSE). thru foramen for greater petrosal nerve. it meets up with deep petrosal nerve (postganglionic sy) to pterygopalatine ganglion. SYNAPSE HERE. up to V2 to zygomatic n. to lacrimal n to lacrimal gland

30

what are the three parts of the globe?

sclera, choroid, and neuronal layer (retina, which we don't care about yet)

31

what muscle changes the shape of the lens?

ciliary muscle via zonular fibers. it attaches to the lens CAPSULE, not the actual lens

32

what two things related to the eye are from the CNS?

retina (from optic cup) and optic nerve (from optic stalk)

33

what germ layer makes the lens?

ectoderm

34

what germ layer does the rest of the eyeball come from

mesoderm

35

t/f sclera and cornea are the same layer

true

36

what layer has the ciliary process and iris?

choroid layer

37

what attaches the lens to the back of the eye?

hyaloid canal

38

dialator muscle is psy or sy control?

sy.

39

what does the fascia of ocular muscles attach to?

check ligaments go to the bone of orbit, otherwise they attach to the sclera

40

what is the space between the fascia of ocular muscles and the fascial sheath of eyeball?

episcleral space

41

____ mm. come from a common tendinous sheath behind the eye

rectus muscles

42

what five nerves go through the common tendinous ring?

oculomotor sup. div. (III), nasociliary n, abducent (VI), oculomotor inf. div (III), optic nerve (II)

43

when you have someone look at your finger, what nerves are you testing?

III, IV, VI

44

what do short ciliary nerves do

go to the ciliary muscles

45

what CN goes to lateral rectus?

abducens CN VI

46

all the branches of V1 are ____

sensory

47

nasociliary nerve is a branch of ___

opthalmic branch of V1

48

trochlear nerve goes to ____

superior oblique m

49

superior division of oculomotor innervates?

levator palpebrae superioris, superior rectus m

50

what are post ganglionic sympatheic nerves going to do in the eye?

diallator pupillae, and intraocular blood vessels

51

what are post synaptic parasympathetic fibers gonna do?

sphincter pupilllae

52

short ciliary nerve contains what types of nerve fibers

postsynap. psymp, postsynap symp, and general sensory fibers

53

arteries to eye are from?

opthalmic artery off the ICA

54

veins from eye go?

to angular vein or to cavernous sinus or to pterygoid plexus. look at this picture because theres a lot

55

infratrochlear n is the terminal branch of?

nasociliary n.

56

external nasal n is terminal branch of?

anterior ethmoidal n.

57

horners syndrom is?

ptosis of muellers muscle

58

if you shine a light in the eye and neither eye responds, what is the problem?

the afferents are not getting the signal back

59

ciliary ganglion lies on the __ side of the optic nerve

lateral

60

if you get a baseball to the eye, what kind of fracture can you get?

blowout fracture

61

do you replace a lens for glaucoma?

uhh. NO.

62

when would one get conjunctival petichiae?

strangulation