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) Pronator quadratus receives innervation from musculocutaneous nerve.
 
        B) Brachioradialis receives innervation from axillary nerve.
 
        C) Rhomboids receives innervation from the brachial plexus.
 
        D) Extensor pollicis longus receives innervation from spinal segment C5.
 
        E) Extensor carpi ulnaris 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) pronator quadratus receives innervation from musculocutaneous nerve.

This answer is incorrect.

The statement, "pronator quadratus receives innervation from musculocutaneous nerve." is false.
pronator quadratus receives innervation from median nerve, receives innervation from anterior interosseous nerve, receives innervation from spinal segment C7, and receives innervation from spinal segment C8.  (See References)

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B) brachioradialis receives innervation from axillary nerve.

This answer is incorrect.

The statement, "brachioradialis receives innervation from axillary nerve." is false.
brachioradialis receives innervation from radial nerve, receives innervation from spinal segment C5, and receives innervation from spinal segment C6.  (See References)

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C) rhomboids receives innervation from the brachial plexus.

This answer is correct.

The statement, "rhomboids receives innervation from the brachial plexus." 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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D) extensor pollicis longus receives innervation from spinal segment C5.

This answer is incorrect.

The statement, "extensor pollicis longus receives innervation from spinal segment C5." is false.
extensor pollicis longus receives innervation from radial nerve, receives innervation from posterior interosseous nerve, receives innervation from spinal segment C7, and receives innervation from spinal segment C8.  (See References)

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E) extensor carpi ulnaris receives innervation from spinal segment C5.

This answer is incorrect.

The statement, "extensor carpi ulnaris receives innervation from spinal segment C5." is false.
extensor carpi ulnaris receives innervation from radial nerve, receives innervation from posterior interosseous nerve, receives innervation from spinal segment C7, and receives innervation from spinal segment C8.  (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
Estimated Permutations: 0