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block 6 > eye > Flashcards

eye Flashcards

1
Q

bones in the orbit

A

frontal, maxillary, zygomatic, sphenoid, ethmoid, lacrimal, palatine

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2
Q

ethmoid fracture may create a conduit to

A

ethmoid sinus

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3
Q

orbital floor fractures may create a conduit to

A

maxillary sinus

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4
Q

blowout fracture to floor causes

A

vertical diplopia

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5
Q

orbicularis oculi does _ and innervated by _

A

closes eye, innervated by CN 7

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6
Q

voluntary muscle of eyelid

A

levator palpebrae

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7
Q

levator palpebrae innervated by

A

CN 3

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8
Q

involuntary muscle of eyelid

A

superior tarsal

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9
Q

complete ptosis

A

loss of CN3- inability to open eye

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10
Q

partial ptosis

A

loss of sympathetic innervation- horner’s syndrome

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11
Q

orbital septum is an extension of

A

periosteum

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12
Q

Tarsus

A

provides support and determines eyelid form, elevates eyelid

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13
Q

stye

A

painful inflammation of sebaceous gland or sweat gland of the eyelash

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14
Q

chalazion

A

inflammation of tarsal gland, frequently painless

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15
Q

eyelids arteries

A

ophthalmic, facial, superficial temporal

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16
Q

lacrimal gland sympathetic

A

plexus on ICA, deep petrosal, nerve of pterygoid canal, through pterygopalatine ganglia

17
Q

lacrimal gland parasympathetic

A

lacrimal nucleus, greater petrosal, nerve of the pterygoid canal, pterygopalatine ganglia

18
Q

extrinsic eye muscles

A

levator papebrae superioris, superior oblique, superior rectus, lateral rectus, medial rectus, inferior rectus, inferior oblique

19
Q

intrinsic eye muscles

A

ciliary muscle, sphincter pupillae, dilator pupillae

20
Q

4 rectus muscles from

A

common tendinous ring

21
Q

LR6SO4 stands for

A

Lateral rectus 6, superior oblique 4

22
Q

arterial supply of orbit

A

ophthalmic artery

23
Q

venous drainage of orbit

A

superior and inferior ophthalmic veins

24
Q

innervation of the orbit

A

CN 2,3,4,5

25
Q

oculomotor nerve palsy

A

ptosis of upper eyelid, pupil down and out, mydriasis, loss of accommodation

block 6 (6 decks)

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