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Lower extremity muscle function and innervation 2

Topic: Pharmacology

Created on Monday, September 18 2006 by

Last modified on Monday, September 18 2006.




Which muscle or muscles would be most affected by a lesion of the L5 and S1 spinal roots?

 
        A) Gluteus maximus
 
        B) Hamstrings
 
        C) Ilipsoas
 
        D) Gastrocnemius and soleus
 
        E) Tibialis anterior
 

 


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This question was created on September 18, 2006 by .
This question was last modified on September 18, 2006.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) gluteus maximus

This answer is correct.


The gluteus maximus muscle is most strongly innervated by the L5 and S1 spinal segments.  (See References)

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B) hamstrings

This answer is incorrect.


The L5 and S1 spinal segments are the segments which most strongly innervate the gluteus maximus.  (See References)

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C) ilipsoas

This answer is incorrect.


The L5 and S1 spinal segments are the segments which most strongly innervate the gluteus maximus.  (See References)

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D) gastrocnemius and soleus

This answer is incorrect.


The L5 and S1 spinal segments are the segments which most strongly innervate the gluteus maximus.  (See References)

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E) tibialis anterior

This answer is incorrect.


The L5 and S1 spinal segments are the segments which most strongly innervate the gluteus maximus.  (See References)

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References:

1. Guarantors of Brain. (2000). Aids to the Examination of the Peripheral Nervous System, fourth edition. W.B. Saunders, Edinburgh.
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pharmacology
Lower extremity muscle function and innervation 2
Question ID: 69182
Question written by . (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 09/18/2006
Modified: 09/18/2006
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