Neuro-Ophthalmology Vol. 2 Flashcards

1
Q

What bone of the skull contains the carotid canal?

A

Petrous portion of the temporal bone

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2
Q

What nerve parallels the internal carotid artery and provides the parasympathetic fibers to the lacrimal gland?

A

Greater superficial petrosal nerve

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3
Q

What artery supplies the cranial nerves as they enter the cavernous sinus?

A

Dorsal meningeal artery

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4
Q

Where does the internal carotid artery become intradural?

A

At the anterior clinioid process (just before giving off the ophthalmic artery}

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5
Q

What structure makes up the terminal portion of the lesser wing of the sphenoid?

A

Anterior clinoid process

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6
Q

Where does the internal carotid artery give off the ophthalmic artery?

A

Just before entering the orbit through the optic canal

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7
Q

Where does the central retinal artery enter the optic nerve?

A

10 to 12 mm posterior to the globe

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8
Q

What does the central retinal artery branch into within the eye?

A

Superior and inferior vascular arcades

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9
Q

What artery supplies the lateral rectus muscle?

A

Anterior ciliary artery via the lacrimal artery

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10
Q

What arteries are responsible for the majority of blood flow to the ciliary body?

A

Superior and inferior muscular branches of the ophthalmic artery

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11
Q

What blood supply may protect the macula in certain patients with CRAO?

A

Cilioretinal artery (30% of patients)

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12
Q

What arteries form the circle of Zinn-Haller surrounding the optic disc?

A

Short posterior ciliary arteries

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13
Q

What artery arises from the internal carotid artery distal to the ophthalmic artery to supply to the optic tract distally to the LGN?

A

Anterior choroidal artery

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14
Q

What artery supplies blood to the optic tract distally to the LGN?

A

Anterior choroidal artery

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15
Q

Name the 3 clinical manifestations of optic tract syndrome.

A
  1. Homonynous hemianopia 2.Band atrophy of the optic disc 3. RAPD
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16
Q

What structure allows blood flow between the carotid and vetebrobasilar circulation?

A

Circle of Willis

17
Q

What arteries make up the circle of Willis?

A

Anterior and posterior communicating arteries

18
Q

What arteries supply the optic chiasm?

A

Proximal anterior cerebral artery and anterior communicating artery

19
Q

What artery supplies the occipital tip representing the macula?

A

Middle cerebral artery (accounts for macular sparing visual fields with PCA occlusion)

20
Q

Where does the right vertebral artery originate?

A

Innominate artery

21
Q

Where does the left vertebral artery originate?

A

Subclavian artery

22
Q

What arteries do the vertebral arteries give rise to before joining to form the basilar artery?

A

Posterior inferior cerebellar artery

23
Q

What vein is responsible for absorbing CSF via the arachnoid villi?

A

Superior sagittal sinus

24
Q

What structure represents the confluence of the cranial venous sinuses?

A

Torcular Herophili

25
Q

What structure do the cavernous sinuses drain into?

A

Superior and inferior petrosal sinus

26
Q

Into what structure do the superior and inferior orbital veins drain into?

A

Cavernous sinus