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PHU: Biweekly Test 2 > Eye > Flashcards

Eye Flashcards

1
Q

thinnest part of ethmoid bone

A

lamina papyracea

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2
Q

optic canal contents

A

CN II and ophthalmic a.

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3
Q

superior orbital fissure contents

A

CN III, CN IV, CN V1, CN VI
and superior ophthalmic v.

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4
Q

what will you hit if you go straight back into the superior orbital fissure

A

internal carotid a.

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5
Q

inferior orbital fissure contents

A

inferior ophthalmic v.

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6
Q

structures inside common tendinous ring

A

ophthalmic a.
CN II
CN III
CN VI
nasociliary n. (branch of CN V1)

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7
Q

structures outside common tendinous ring

A

CN IV
frontal n. (branch of CN V1)
lacrimal n. (branch of CN V1)
superior ophthalmic v.

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8
Q

vascular layer of eye

A

choroid

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9
Q

what produces aqueous humour

A

ciliary body

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10
Q

artery of the retina that is in the choroid layer

A

cilioretinal a.

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11
Q

superficial to deep the layers of eye

A

sclera, choroid, retina

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12
Q

what 3 types of cells make up conjunctiva

A

stratified squamous
columnar epithelial
goblet

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13
Q

function of conjunctiva

A

lubricate eye
immunosurveillance

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14
Q

2 parts of conjunctiva

A

bulbar and palpebral

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15
Q

3 causes of conjunctiva:

A

allergies, bacteria, virus

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16
Q

difference b/t bacterial and viral conjunctiva

A

bacterial: thick discharge
viral: thin discharge

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17
Q

caused by increase in intraocular pressure causing blindness

A

glaucoma

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18
Q

what keeps retina against choroid

A

vitreous humour

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19
Q

when vitreous separates from retina

A

vitreous detachment

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20
Q

when retina detached from choroid

A

retinal detachment

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21
Q

causes of retinal detachment

A

diabetes
injury
aging
heat from surgery

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22
Q

when a piece of tissue is missing from structure of eye

A

Coloboma

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23
Q

2 branches of frontal nerve

A

supraorbital (more lateral)
supratrochlear (more medial)

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24
Q

95% of ocular melanomas happen here

A

uveal tract

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25
Q

uveal tract contains:

A

iris, ciliary body, choroid

vascular (and poor lymphatics)

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26
Q

a sign of melanoma (color)

A

orange pigment

27
Q

arteries of the orbit

A

ophthalmic a.
internal carotid a.

28
Q

veins of the orbit (and where they drain)

A

superior ophthalmic v.
inferior ophthalmic v.

drain in cavernous sinus

29
Q

3 sensory branches of ophthalmic n.

A

frontal n.
lacrimal n. ( NOT to lacrimal gland)
nasociliary n.

30
Q

provides all sensory info. to the eye

A

ophthalmic n.

31
Q

ganglion in the orbit and 3 nerves associated

A

ciliary ganglion
short and long ciliary
nasociliary

32
Q

3 motor nerves to extraocular muscles of eye

A

CN III
CN IV
CN VI

33
Q

motor n. supplying these muscles:
levator palpebrae superioris
superior rectus
medial rectus
inferior rectus
inferior oblique

A

CN III (oculomotor)

34
Q

the rectus muscles of eye have a secondary action of what

A

move eye in

35
Q

the oblique muscles of eye have a secondary action of what

A

move eye out

36
Q

trochlear n. (CN IV) innervates what muscle

A

superior oblique m.

37
Q

abducens n. (CN VI) innervates what muscle

A

lateral rectus

38
Q

H-Test steps for checking superior rectus and inferior rectus muscles

A

first: move eye out to take away the secondary action of in
second: move up or down

39
Q

H-Test for lateral rectus m.

40
Q

H-Test for medial rectus m.

41
Q

H-Test steps for inferior and superior oblique muscles

A

first: move eye in to eliminate secondary action of out
second: move up (to check inferior) and move down (to check superior)

42
Q

L oculomotor nerve palsy causes what eye position

A

down and out

43
Q

L abducens nerve palsy causes what eye position

44
Q

R trochlear nerve palsy causes what eye position

45
Q

the 2 intrinsic ocular muscles that are innervated by parasympathetics

A

ciliary m.
sphincter pupillae m.

46
Q

this intrinsic m. relaxes the lens and accommodates for close vision

A

ciliary m.

47
Q

this intrinsic m. constricts pupil

A

sphincter pupillae m.

48
Q

pathway of intrinsic muscle parasympathetic innervation:

A
  1. Edinger Westphal Nucleus
  2. CN III
  3. Ciliary ganglion
  4. short ciliary nerves
  5. intrinsic muscles of eye
49
Q

preganglionic parasympathetic cell bodies are found where in the eye when discussing intrinsic eye muscles

A

Edinger Westphal Nucleus

50
Q

sensory to side of the face
innervated by parasympathetics, NOT lacrimal n.

A

lacrimal gland

51
Q

preganglionic parasympathetic cell bodies in the eye are found where when discussing lacrimal gland

A

superior salivatory nucleus

52
Q

parasympathetic pathway to lacrimal gland:

A
  1. superior salivatory nucleus
  2. greater petrosal n. (branch of VII)
  3. greater wing of sphenoid (pterygoid canal)
  4. pterygopalatine ganglion
  5. infraorbital n. to lacrimal n.
  6. lacrimal gland
53
Q

cell bodies of preganglionic sympathetics found where

A

superior cervical ganglion

54
Q

brings sympathetics to pterygoid canal and its nerve

A

deep petrosal n.

55
Q

tarsal plate (under eyelid) gland dysfunction can cause what

56
Q

nerve of the pterygoid canal

57
Q

this muscle helps levator palpebrae superioris keep eyelid from closing

A

Muller’s m.

58
Q

sympathetic pathway to muller’s m.

A
  1. superior cervical ganglion
  2. internal carotid a.
  3. ophthalmic a.
  4. muller’s m.
59
Q

intrinsic ocular muscle innervated by sympathetics and causes pupil dilation

also has similar pathway as muller’s m. innervation

A

dilator pupillae m.

60
Q

this syndrome is caused by loss of sympathetic innervation to head

A

Horner’s syndrome

61
Q

sx’s of Horner’s syndrome:

A

pupil constriction
dilated blood vessels (flushing)
ptosis
anhydrosis

62
Q

Corneal Reflex (blink reflex) sensory innervation

A

Ophthalmic n. (CN V1)

63
Q

Corneal Reflex (blink reflex) motor innervation

A

Facial n. (CN VII)

PHU: Biweekly Test 2 (12 decks)

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