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Spinal segments innervating muscles of the lower extremity 2

Topic: Anatomy

Created on Wednesday, August 30 2006 by jdmiles

Last modified on Tuesday, November 4 2008.

Regarding the muscles of the lower extremity, which of the following muscles typically receives innervation from the L2 spinal segment?

 
        A) Tibialis anterior
 
        B) Obturator externus
 
        C) Popliteus
 
        D) Pectineus
 
        E) Obturator internus
 

 


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This question was created on August 30, 2006 by jdmiles.
This question was last modified on November 04, 2008.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) Tibialis anterior

This answer is incorrect.


Tibialis anterior typically receives innervation from spinal segments L4 and L5  (See References)

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B) Obturator externus

This answer is incorrect.


Obturator externus typically receives innervation from spinal segments L3 and L4  (See References)

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C) Popliteus

This answer is incorrect.


Popliteus typically receives innervation from spinal segments L4, L5, and S1  (See References)

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D) Pectineus

This answer is correct.


The muscles of the lower extremity which typically receive innervation from spinal segment l2 include iliacus, psoas major, quadratus lumborum, sartorius, rectus femoris, vastus lateralis, vastus medialis, vastus intermedius, pectineus, adductor longus, adductor brevis, adductor magnus, and gracilis  (See References)

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E) Obturator internus

This answer is incorrect.


Obturator internus typically receives innervation from spinal segments L5 and S1  (See References)

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References:

1. Moore, K.L. (1992). Clinical Oriented Anatomy, 3rd Edition. Williams & Wilkins, Baltimore. (ISBN:068306133X)Advertising:
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anatomy
Spinal segments innervating muscles of the lower extremity 2
Question ID: 830200603
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 08/30/2006
Modified: 11/04/2008
Estimated Permutations: 0

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