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 teres receives innervation from anterior interosseous nerve.
 
        B) Abductor pollicis brevis receives innervation from spinal segment C3.
 
        C) Triceps receives innervation from radial nerve.
 
        D) Flexor digitorum profundus I receives innervation from musculocutaneous nerve.
 
        E) The dorsal interossei receives innervation from axillary 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) pronator teres receives innervation from anterior interosseous nerve.

This answer is incorrect.

The statement, "pronator teres receives innervation from anterior interosseous 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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B) abductor pollicis brevis receives innervation from spinal segment C3.

This answer is incorrect.

The statement, "abductor pollicis brevis receives innervation from spinal segment C3." is false.
abductor pollicis brevis receives innervation from median nerve, receives innervation from spinal segment C8, and receives innervation from spinal segment T1.  (See References)

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C) triceps receives innervation from radial nerve.

This answer is correct.

The statement, "triceps receives innervation from radial nerve." is true.
triceps receives innervation from radial nerve, receives innervation from spinal segment C6, receives innervation from spinal segment C7, and receives innervation from spinal segment C8.  (See References)

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D) flexor digitorum profundus I receives innervation from musculocutaneous nerve.

This answer is incorrect.

The statement, "flexor digitorum profundus I receives innervation from musculocutaneous nerve." is false.
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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E) the dorsal interossei receives innervation from axillary nerve.

This answer is incorrect.

The statement, "the dorsal interossei receives innervation from axillary 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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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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