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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 ulnar nerve?

 
        A) Supraspinatus
 
        B) Infraspinatus
 
        C) The palmar interossei
 
        D) Extensor pollicis brevis
 
        E) Extensor pollicis longus
 

 


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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) supraspinatus

This answer is incorrect.


Supraspinatus is innervated by the suprascapular nerve, which arises from the upper trunk of the brachial plexus  (See References)

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B) infraspinatus

This answer is incorrect.


Infraspinatus is innervated by the suprascapular nerve, which arises from the upper trunk of the brachial plexus  (See References)

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C) the palmar interossei

This answer is correct.


The palmar interossei is innervated by the ulnar nerve  (See References)

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D) extensor pollicis brevis

This answer is incorrect.


Extensor pollicis brevis is innervated by the radial nerve  (See References)

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E) extensor pollicis longus

This answer is incorrect.


Extensor pollicis longus is innervated by the radial nerve  (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: 90619200

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