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Innervation of muscles of the upper extremity

Topic: Anatomy

Created on Wednesday, August 9 2006 by

Last modified on Wednesday, December 31 1969.

Which of the following muscles is innervated by the radial nerve?

 
        A) Extensor indicis
 
        B) Lumbricals IV
 
        C) Latissimus dorsi
 
        D) The hypothenar muscles
 
        E) Serratus anterior
 

 


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This question was created on August 09, 2006 by .
This question was last modified on December 31, 1969.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) extensor indicis

This answer is correct.


Extensor indicis is innervated by the radial nerve  (See References)

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B) lumbricals IV

This answer is incorrect.


Lumbricals IV is innervated by the ulnar nerve  (See References)

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C) latissimus dorsi

This answer is incorrect.


Latissimus dorsi is innervated by the thoracodorsal nerve, which arises from the brachial plexus  (See References)

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D) the hypothenar muscles

This answer is incorrect.


The hypothenar muscles is innervated by the ulnar nerve  (See References)

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E) serratus anterior

This answer is incorrect.


Serratus anterior is innervated by the long thoracic nerve, which arises from the brachial plexus  (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.
2. Moore, K.L. (1992). Clinical Oriented Anatomy, 3rd Edition. Williams & Wilkins, Baltimore.
3. Preston, D.C., and Shapiro, B.E. (2005). Electromyography and Neuromuscular Disorders: Clinical-Electrophysiologic Correlations, 2nd Edition. Elsevier, Philadelphia.
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anatomy
Innervation of muscles of the upper extremity
Question ID: 12270602
Question written by . (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 08/09/2006
Modified: 12/31/1969
Estimated Permutations: 103564800

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