Eye and ear Flashcards

(45 cards)

1
Q

bones of orbit

A
Frontal bone
    Lacrimal bone
    Ethmoid bone 
    Zygomatic bone
    Maxillary bone
    Palatine bone 
    Sphenoid bone
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2
Q

lacrimal gland located

A

laterally and superiorly

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3
Q

lacrimal gland drains

A

medially; into the lacrimal canaliculi to the sac. Then it passes to the internal nasal meatus through the nasal lacrimal duct

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4
Q

levator palpabrae superioris action

A

Elevates superior eyelid

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5
Q

antagonist to levator palpabrae superioris

A

orbicularis oculi

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6
Q

opthalmic branch of trigeminal form

A

supraorbital and supratrochlear

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7
Q

maxillary branch of trigeminal forms

A

infraorbital

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8
Q

Superior oblique runs through the _____ and attaches _______.

A

trochlea; posteriorly

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9
Q

inferior oblique attaches

A

medially and anteriorly

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10
Q

inferior oblique action

A

abducts and elevates eye

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11
Q

ethmoid sinus location

A

medial to orbital

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12
Q

medial rectus is _______ to the superior oblique

A

lateral

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13
Q

superior rectis is ______ to the levator palpabrae superioris

A

inferior

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14
Q

superior rectus is deep to

A

levator palpabrae superioris

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15
Q

ciliary muscle

A

sensory, symp, parasymp (pupil size, etc)

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16
Q

optic nerve formed by

A

axons from ganglion layer

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17
Q

optic nerve is sensory for

A

sight

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18
Q

oculomotor nerve superior division innervates

A

superior rectus, levator palpabrae superioris

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19
Q

oculomotor nerve inferior division innervates

A

medial and inferior rectus, inferior oblique

20
Q

trochlear innervates

A

superior oblique

21
Q

abducens innervates

A

lateral rectus

22
Q

levator palpabrae superioris O&I

A

O: lesser wing of spenoid bone, sup and ant to optic canal
I: superior tarsus and skin of superior eyelid

23
Q

superior oblique o&i

A

O: body of sphenoid
I: Sclera of eye

24
Q

Tendon of superior oblique passes through ______, changes its direction, and inserts deep to _____.

A

a fibrous ring or trochlea; superior rectus muscle

25
superior oblique action
abducts and drepresses eyeball
26
Inferior oblique o&i
O: anterior part of floor of orbit I: Sclera deep to lateral rectus muscle
27
O&I for all rectus muscles
O: common tendinous ring I: sclera just posterior to corneoscleral junction
28
superior rectus
Elevates and adducts eyeball
29
inferior rectus
Depresses and adducts eyeball
30
medial rectus
adducts eyeball
31
lateral rectus
abducts eyeball
32
optic disc
back of eye where optic nerve comes out; blind spot
33
macula
back of eye where light focuses; best visual accuity
34
cochlea is for
hearing; located anteriorly
35
semicircular canals (vestibular region)
balance, position sense
36
3 ossicles (____,____,&______) attach to
maleus, incus, and stapes; tempanic membrane
37
oval window action
vibrates perilymph (fluid)------> sound
38
if tensor tympani tenses,
vibration of ossicles stops
39
base of stapes occupies
oval window
40
malleus is against
external acoustic meatus
41
incus is located
between stapes and malleus
42
labyrinth is a ______ structure that contains _____
membraneous; endolymph
43
bony labyrinth is part of
temporal bone
44
when basilar membrane vibrates and hair cells move
sound is produced
45
round window
absorbs vibration