nerves innervating the muscles of the upper extremity

Topic: Anatomy

Created on Sunday, September 3 2006 by

Last modified on Sunday, September 3 2006.

 
        A) Flexor digitorum profundus III receives innervation from anterior interosseous nerve.
 
        B) Rhomboids receives innervation from spinal segment C4.
 
        C) Flexor carpi radialis receives innervation from spinal segment C6.
 
        D) The palmar interossei receives innervation from spinal segment T1.
 
        E) Deltoid receives innervation from spinal segment C5.
 

 

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This question was created on September 03, 2006 by .
This question was last modified on September 03, 2006.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS

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A) flexor digitorum profundus III receives innervation from anterior interosseous nerve.

This answer is correct.

The statement, "flexor digitorum profundus III receives innervation from anterior interosseous nerve." is false.
flexor digitorum profundus III receives innervation from ulnar nerve, receives innervation from spinal segment C7, and receives innervation from spinal segment C8.  (See References)

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B) rhomboids receives innervation from spinal segment C4.

This answer is incorrect.

The statement, "rhomboids receives innervation from spinal segment C4." is true.
rhomboids receives innervation from the brachial plexus, receives innervation from spinal segment C4, and receives innervation from spinal segment C5.  (See References)

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C) flexor carpi radialis receives innervation from spinal segment C6.

This answer is incorrect.

The statement, "flexor carpi radialis receives innervation from spinal segment C6." is true.
flexor carpi radialis receives innervation from median nerve, receives innervation from spinal segment C6, and receives innervation from spinal segment C7.  (See References)

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D) the palmar interossei receives innervation from spinal segment T1.

This answer is incorrect.

The statement, "the palmar interossei receives innervation from spinal segment T1." is true.
the palmar interossei receives innervation from ulnar nerve, receives innervation from spinal segment C8, and receives innervation from spinal segment T1.  (See References)

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E) deltoid receives innervation from spinal segment C5.

This answer is incorrect.

The statement, "deltoid receives innervation from spinal segment C5." is true.
deltoid receives innervation from axillary nerve, receives innervation from spinal segment C5, and receives innervation from spinal segment C6.  (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.

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anatomy
nerves innervating the muscles of the upper extremity
Question ID: 683156834
Question written by . (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 09/03/2006
Modified: 09/03/2006
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