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Year 2 Neuro (JK) > Anatomy of the eye and orbit (neurovascular) > Flashcards

Anatomy of the eye and orbit (neurovascular) Flashcards

1
Q

Sensory innervation of the eye and orbit by..

A

trigeminal nerve - ophthalmic and maxillary branches - CN V1,2

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2
Q

What fissure does the V1 enter?

A

superior orbital fissure

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3
Q

3 divisions of CN V1

A

lacrimal
frontal
nasociliary

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4
Q

How does CNV2 enter and leave the orbit?

A

inferior orbital canal

infra orbital foramen as the infraorbital nerve

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5
Q

What is the ophthalmic artery a branch of? be specific

A

ICA - intracranial part

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6
Q

How does the ophthalmic artery enter the orbit?

A

optic canal/ foramen

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7
Q

what artery pierces the optic nerve?

A

central retinal artery

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8
Q

What does the central retinal artery supply?

A

the inner layers of the retina

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9
Q

What is the arterial supply of the outer layers of the retina?

A

choroid

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10
Q

What does the short posterior ciliary arteries supply?

A

posterior part of the choroid

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11
Q

How is the retina viewed?

A

with an ophthalmascope

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12
Q

What is this picture with an opthalmascope called?

A

fundus picture

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13
Q

What is the yellow disc seen in the ophthalmascope

A

optic disc/head of the optic nerve

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14
Q

What is the optic disc known as physiologically and why?

A

blind spot - no rods and cones

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15
Q

What are the 4 quadrants of the eye called?

A

upper nasal, lower temporal

upper nasal, lower temporal

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16
Q

What are the 2 veins of the orbit?

A

superior and inferior ophthalmic veins

17
Q

What do the inferior and superior ophthalmic veins drain into?

A

cavernous sinus

18
Q

Where is the cavernous sinus located?

A

just behind apex of the orbit on either side of the bosy of the sphenoid

19
Q

What is the cavernous sinus one of?

A

intracranial venous sinus

20
Q

What layers between are the cavernous sinus?

A

dura mater

21
Q

contents of the cavernous sinus

A

ICA

CN 3,4,5(1) and 6

22
Q

Clinical significance of cavernous sinus contents?

A

infection or fistula can lead to visual problems

Year 2 Neuro (JK) (50 decks)

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