Visual Field Deficits Flashcards

0
Q

Papilledema

A

Increased ICP causing the optic disc to swell due to decreased venous outflow from the eye

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1
Q

Size of optic disc

A

1.5mm

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2
Q

Optic disc swelling

A

Can be caused by hypertension or optic neuritis

*Common presenting sign in MS

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3
Q

Relative Afferent Pupillary Defect

A

“Marcus Gunn pupil”

-Sluggish response of eye upon light stimulation usually caused by optic neuritis

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4
Q

Shaken Baby Syndrome

A

Retinal hemorrhage
Papilledema
Retinal Detachment
Ecchymosis of sternum

*Long term consequences include blindness, epilepsy, axonal injury, even brainstem avulsion (not good if you want to live)

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5
Q

Superior Right Retinal Quadrant

A

Project to medial portion of ipsilateral LGN

=> projects via optic radiations to cuneus gyrus of ipsilateral occipital lobe

*Represents inferior left visual field

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6
Q

Lesion of temporal retinal fibers

A

Blindness in nasal visual field of ipsilateral eye; commonly caused by ICA aneurysm

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7
Q

Lesion of Meyer’s Loop

A

Contralateral upper homonymous quadrantanopsia

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8
Q

PCA Stroke

A

Contralateral homonymous hemianopsia w/ macular sparing

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9
Q

Lesion of optic chiasm

A

Bitemporal homonymous hemianopsia

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10
Q

Projection of lower right retinal field

A

Synapses in right, lateral LGN and then travels via Meyer’s Loop to the Lingual gyrus

*Represents the Upper Left Visual Field

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11
Q

Macular Projection of right 1/2

A

Projects to central portion of right LGN; then projects to posterior 1/3 of cuneus and lingual gyri

*Represents the left 1/2 of macular field

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