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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.

A patient presents with weakness of the ilipsoas. Which of the following spinal root segments represents the minimum lesion required to cause this deficit?

A) L2 and L3

B) L1 and L2

C) L4

D) L3 and L4

E) L5 and S1

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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) L2 and L3

This answer is incorrect.

The L1 and L2 spinal segments are the segments which most strongly innervate the ilipsoas. (See References)


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B) L1 and L2

This answer is correct.

The ilipsoas muscle is most strongly innervated by the L1 and L2 spinal segments. (See References)


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C) L4

This answer is incorrect.

The L1 and L2 spinal segments are the segments which most strongly innervate the ilipsoas. (See References)


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D) L3 and L4

This answer is incorrect.

The L1 and L2 spinal segments are the segments which most strongly innervate the ilipsoas. (See References)


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E) L5 and S1

This answer is incorrect.

The L1 and L2 spinal segments are the segments which most strongly innervate the ilipsoas. (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
Estimated Permutations: 0