Roots of the brachial plexus and the muscles they innervate 01

Topic: Pharmacology

Created on Tuesday, September 9 2008 by jdmiles

Last modified on Tuesday, September 9 2008.

 
        A) C3 and C4
 
        B) C3, C4, and C5
 
        C) C4 and C5
 
        D) C7 and C8
 
        E) C5 and C6
 

 

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This question was created on September 09, 2008 by jdmiles.
This question was last modified on September 09, 2008.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS

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A) C3 and C4

This answer is incorrect.

Extensor pollicis longus receives innervation from the C7 and C8 roots. C7 provides the most significant portion of the innervation.  (See References)

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B) C3, C4, and C5

This answer is incorrect.

Extensor pollicis longus receives innervation from the C7 and C8 roots. C7 provides the most significant portion of the innervation.  (See References)

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C) C4 and C5

This answer is incorrect.

Extensor pollicis longus receives innervation from the C7 and C8 roots. C7 provides the most significant portion of the innervation.  (See References)

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D) C7 and C8

This answer is correct.

Extensor pollicis longus receives innervation from the C7 and C8 roots. C7 provides the most significant portion of the innervation.  (See References)

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E) C5 and C6

This answer is incorrect.

Extensor pollicis longus receives innervation from the C7 and C8 roots. C7 provides the most significant portion of the innervation.  (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. (ISBN:0702025127)	Advertising:
2. Preston, D.C., and Shapiro, B.E. (2005). Electromyography and Neuromuscular Disorders: Clinical-Electrophysiologic Correlations, 2nd Edition. Elsevier, Philadelphia. (ISBN:075067492X)	Advertising:

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pharmacology
Roots of the brachial plexus and the muscles they innervate 01
Question ID: 09090804
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 09/09/2008
Modified: 09/09/2008
Estimated Permutations: 0