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) Extensor pollicis longus receives innervation from ulnar nerve.
 
        B) The dorsal interossei receives innervation from median nerve.
 
        C) Brachioradialis receives innervation from radial nerve.
 
        D) Flexor digitorum profundus II receives innervation from medial cutaneous nerve of the forearm.
 
        E) Extensor indicis receives innervation from spinal segment C4.
 

 

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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) extensor pollicis longus receives innervation from ulnar nerve.

This answer is incorrect.

The statement, "extensor pollicis longus receives innervation from ulnar nerve." 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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B) the dorsal interossei receives innervation from median nerve.

This answer is incorrect.

The statement, "the dorsal interossei receives innervation from median nerve." is false.
the dorsal 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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C) brachioradialis receives innervation from radial nerve.

This answer is correct.

The statement, "brachioradialis receives innervation from radial nerve." is true.
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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D) flexor digitorum profundus II receives innervation from medial cutaneous nerve of the forearm.

This answer is incorrect.

The statement, "flexor digitorum profundus II receives innervation from medial cutaneous nerve of the forearm." is false.
flexor digitorum profundus II 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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E) extensor indicis receives innervation from spinal segment C4.

This answer is incorrect.

The statement, "extensor indicis receives innervation from spinal segment C4." is false.
extensor indicis 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