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Spinal segments innervating muscles of the lower extremity 1

Topic: Anatomy

Created on Wednesday, August 30 2006 by

Last modified on Wednesday, December 31 1969.

Which of the following spinal segments typically contributes to the innervation of the piriformis muscle in the lower extremity?

 
        A) T9
 
        B) S4
 
        C) S2
 
        D) L2
 
        E) L4
 

 


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This question was created on August 30, 2006 by .
This question was last modified on December 31, 1969.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) T9

This answer is incorrect.


T9 does not usually innervate the piriformis muscle in the lower extremity.  (See References)

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B) S4

This answer is incorrect.


S4 does not usually innervate the piriformis muscle in the lower extremity.  (See References)

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C) S2

This answer is correct.


Piriformis typically receives innervation from spinal segments S1 and S2  (See References)

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D) L2

This answer is incorrect.


L2 does not usually innervate the piriformis muscle in the lower extremity.  (See References)

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E) L4

This answer is incorrect.


L4 does not usually innervate the piriformis muscle in the lower extremity.  (See References)

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References:

1. Moore, K.L. (1992). Clinical Oriented Anatomy, 3rd Edition. Williams & Wilkins, Baltimore.
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anatomy
Spinal segments innervating muscles of the lower extremity 1
Question ID: 830200602
Question written by . (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 08/30/2006
Modified: 12/31/1969
Estimated Permutations: 0

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