Lecture 1: Vision lesions Flashcards Preview

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Flashcards in Lecture 1: Vision lesions Deck (18)
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1
Q

So a guy comes in and lost vision in his whole RIGHT eye, where is the lesion?

A

RIGHT optic nerve

2
Q

Pt comes in with vision loss on the right lateral and left lateral vision fields, where is the lesion?

A

Optic Chiasm

3
Q

A lesion at the optic chasm causes what kind of vision loss?

A

Bitemporal hemianopia

4
Q

A lesion at the optic tract causes what kind of vision loss?

A

contralateral homoymous hemianopia

ie: if the lesion is on the right optic tract, it will cause left homonymous hemianopia

5
Q

Describe the vision loss in: homonymous hemianopia

A

loss of the same side of vision in BOTH eyes

6
Q

Describe the vision loss in: bitemporal homonymous

A

loss of temporal fields in BOTH eyes

7
Q

Ptosis + Miosis + Anhydrosis = ____

A

HORNERS

8
Q

Damage to Posterior Commissure =

A

NO consensual light reflex; Normal direct light reflex

9
Q

Damage to Optic Chiasm=

A

NO consensual light reflex; Normal direct light reflex & Bitemporal Hemianopia- Lateral half vision loss bilateral eye

10
Q

Damage to Occulomotor N=

A

IPSILATERAL lateral strabismus, diplopia, pupillary dilation, ptosis, paralysis

11
Q

Damage to Trochlear N=

A

Diplopia of some eye movements (walking down stairs); No strabumus/ptosis

12
Q

Damage to Abducens N=

A

IPSILATERAL medial strabismus, diplopia; NO ptosis, normal pupils

13
Q

Damage to Medial Longitudinal Fasciculus

A

Diplopia, NO horizontal gaze to affected side. NO strabismus, ptosis, normal pupils

14
Q

Damage to Frontal eye fields via stroke= (where do eyes move)

A

Eyes deviated to AFFECTED side; cant do saccadic mvmts to damaged side

15
Q

Damage due to Seizure= (where do eyes move)

A

Eyes deviated to NORMAL side; cant do saccadic mvmts to normal side

16
Q

Damage to Meyers Loop?

A

CONTRALATERAL SUPERIOR Quadrantanopia

17
Q

Damage to Lower calcimine fissure

A

CONTRALATERAL SUPERIOR Quadrantanopia

18
Q

Damage to Upper calcrine fissure

A

CONTRALATERAL INFERIOR Quadrantanopia