Extraocular muscles

Topic: Anatomy

Created on Tuesday, July 11 2006 by

Last modified on Wednesday, December 31 1969.

 
        A) Right medial rectus
 
        B) Right lateral rectus
 
        C) Right oblique rectus
 
        D) Right inferior rectus
 
        E) Left oblique rectus
 

 

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This question was created on July 11, 2006 by .
This question was last modified on December 31, 1969.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS

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A) right medial rectus

This answer is incorrect.

This presentation is typical of a paresis of the right inferior rectus. A patient with a paresis of the right medial rectus muscle will have impaired adduction of the right eye, and is likely to try to minimize his diplopia by looking at the world with his chin turned toward his left shoulder and his left eye abducted.  (See References)

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B) right lateral rectus

This answer is incorrect.

This presentation is typical of a paresis of the right inferior rectus. A patient with a paresis of the right lateral rectus muscle will have impaired adbuction of the right eye, and is likely to try to minimize his diplopia by looking at the world with his chin turned toward his right shoulder and his left eye adducted.  (See References)

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C) right oblique rectus

This answer is incorrect.

This presentation is typical of a paresis of the right inferior rectus. The right oblique rectus is not a real muscle.  (See References)

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D) right inferior rectus

This answer is correct.

This presentation is typical of a paresis of the right inferior rectus. A patient with a paresis of the right inferior rectus muscle will have impaired depression and outward rotation of the right eye, and is likely to try to minimize his diplopia by looking at the world with his chin held down with no extraordinary tilting of his head.  (See References)

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E) left oblique rectus

This answer is incorrect.

This presentation is typical of a paresis of the right inferior rectus. The left oblique rectus is not a real muscle.  (See References)

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References:

1. Ross, R.T. (1999). How to Examine the Nervous System, 3rd Edition. Appleton & Lange, Stamford, Connecticut. Pp. 45-60

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anatomy
Extraocular muscles
Question ID: 0000003
Question written by . (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 07/11/2006
Modified: 12/31/1969
Estimated Permutations: 0