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 II receives innervation from ulnar nerve.
 
        B) The dorsal interossei receives innervation from spinal segment C5.
 
        C) Infraspinatus receives innervation from spinal segment T2.
 
        D) Flexor pollicis brevis receives innervation from posterior interosseous nerve.
 
        E) Adductor pollicis receives innervation from spinal segment C8.
 

 

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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 II receives innervation from ulnar nerve.

This answer is incorrect.

The statement, "flexor digitorum profundus II receives innervation from ulnar nerve." 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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B) the dorsal interossei receives innervation from spinal segment C5.

This answer is incorrect.

The statement, "the dorsal interossei receives innervation from spinal segment C5." 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) infraspinatus receives innervation from spinal segment T2.

This answer is incorrect.

The statement, "infraspinatus receives innervation from spinal segment T2." is false.
infraspinatus receives innervation from the brachial plexus, receives innervation from spinal segment C5, and receives innervation from spinal segment C6.  (See References)

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D) flexor pollicis brevis receives innervation from posterior interosseous nerve.

This answer is incorrect.

The statement, "flexor pollicis brevis receives innervation from posterior interosseous nerve." is false.
flexor 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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E) adductor pollicis receives innervation from spinal segment C8.

This answer is correct.

The statement, "adductor pollicis receives innervation from spinal segment C8." is true.
adductor pollicis 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
Estimated Permutations: 0