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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) Teres major
 
        B) Pectoralis major
 
        C) Lumbricals II
 
        D) Flexor digitorum profundus IV
 
        E) Rhomboids
 

 


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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) teres major

This answer is incorrect.


Teres major is innervated by the subscapular nerve, which arises from the posterior cord of the brachial plexus  (See References)

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B) pectoralis major

This answer is incorrect.


Pectoralis major is innervated by the medial and lateral pectoral nerves, which arise from the brachial plexus  (See References)

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C) lumbricals II

This answer is incorrect.


Lumbricals II is innervated by the median nerve  (See References)

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D) flexor digitorum profundus IV

This answer is correct.


Flexor digitorum profundus IV is innervated by the ulnar nerve  (See References)

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E) rhomboids

This answer is incorrect.


Rhomboids is innervated by the dorsal scapular nerve, which arises from the root of C5 in 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: 90619200

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