Zoe MCQ 18

Topic: Anatomy

Created on Saturday, November 26 2022 by zoe

Last modified on Saturday, November 26 2022.

 
        A) Bitemporal hemianopsia
 
        B) Homonymous superior right quadrantanopsia
 
        C) Right monocular blindness
 
        D) Binasal hemianopsia
 

 

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This question was created on November 26, 2022 by zoe.
This question was last modified on November 26, 2022.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS

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A) Bitemporal hemianopsia

This answer is correct.

At the optic chiasm, all fibers from the nasal half of each retina cross to the contralateral optic tract. A lesion here would produce loss of the temporal visual fields.   (See References)

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B) Homonymous superior right quadrantanopsia

This answer is incorrect.

At the optic chiasm, all fibers from the nasal half of each retina cross to the contralateral optic tract. A lesion here would produce loss of the temporal visual fields.   (See References)

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C) Right monocular blindness

This answer is incorrect.

At the optic chiasm, all fibers from the nasal half of each retina cross to the contralateral optic tract. A lesion here would produce loss of the temporal visual fields. Right monocular blindness would be produced from a lesion of the left optic tract  (See References)

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D) Binasal hemianopsia

This answer is incorrect.

At the optic chiasm, all fibers from the nasal half of each retina cross to the contralateral optic tract. A lesion here would produce loss of the temporal visual fields.   (See References)

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References:

1. Nolte Chapter 17: Page 421

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anatomy
Zoe MCQ 18
Question ID: 112622090
Question written by zoe. (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 11/26/2022
Modified: 11/26/2022
Estimated Permutations: 24