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) The hypothenar muscles receives innervation from radial nerve.
 
        B) Flexor digitorum profundus I receives innervation from median nerve.
 
        C) Extensor pollicis brevis receives innervation from musculocutaneous nerve.
 
        D) Biceps brachii receives innervation from posterior interosseous nerve.
 
        E) Pronator teres receives innervation from radial nerve.
 

 

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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) the hypothenar muscles receives innervation from radial nerve.

This answer is incorrect.

The statement, "the hypothenar muscles receives innervation from radial nerve." is false.
the hypothenar muscles receives innervation from ulnar nerve, receives innervation from spinal segment C8, and receives innervation from spinal segment T1.  (See References)

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B) flexor digitorum profundus I receives innervation from median nerve.

This answer is correct.

The statement, "flexor digitorum profundus I receives innervation from median nerve." is true.
flexor digitorum profundus I 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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C) extensor pollicis brevis receives innervation from musculocutaneous nerve.

This answer is incorrect.

The statement, "extensor pollicis brevis receives innervation from musculocutaneous nerve." is false.
extensor pollicis brevis 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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D) biceps brachii receives innervation from posterior interosseous nerve.

This answer is incorrect.

The statement, "biceps brachii receives innervation from posterior interosseous nerve." is false.
biceps brachii receives innervation from musculocutaneous nerve, receives innervation from spinal segment C5, and receives innervation from spinal segment C6.  (See References)

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E) pronator teres receives innervation from radial nerve.

This answer is incorrect.

The statement, "pronator teres receives innervation from radial nerve." is false.
pronator teres receives innervation from median nerve, receives innervation from spinal segment C6, and receives innervation from spinal segment C7.  (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