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Sensory innervation of the upper extremity 03

Topic: Anatomy

Created on Friday, January 25 2008 by jdmiles

Last modified on Friday, January 25 2008.

During a neurologic exam, you apply pressure to a patient's middle finger, and he tells you that he is able to feel it normally. In general, this suggests that which of the following peripheral structures are intact?

 
        A) Radial nerve, medial cord of the brachial plexus, and C5 spinal nerve
 
        B) Median nerve, lateral cord of the brachial plexus, and C7 spinal nerve
 
        C) Radial nerve, medial cord of the brachial plexus, and C6 spinal nerve
 
        D) Median nerve, lateral cord of the brachial plexus, and C6 spinal nerve
 
        E) Radial nerve, lateral cord of the brachial plexus, and C8 spinal nerve
 

 


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This question was created on January 25, 2008 by jdmiles.
This question was last modified on January 25, 2008.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) radial nerve, medial cord of the brachial plexus, and C5 spinal nerve

This answer is incorrect.


The medial cord does not typically provide sensation to the middle finger. The radial nerve does not typically provide sensation to the middle finger. C5 does not typically provide sensation to the middle finger.   (See References)

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B) median nerve, lateral cord of the brachial plexus, and C7 spinal nerve

This answer is correct.


Sensation from the middle finger is generally carried by the median nerve, lateral cord, and C7 spinal nerve.   (See References)

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C) radial nerve, medial cord of the brachial plexus, and C6 spinal nerve

This answer is incorrect.


The medial cord does not typically provide sensation to the middle finger. The radial nerve does not typically provide sensation to the middle finger. C6 does not typically provide sensation to the middle finger.   (See References)

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D) median nerve, lateral cord of the brachial plexus, and C6 spinal nerve

This answer is incorrect.


C6 does not typically provide sensation to the middle finger.   (See References)

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E) radial nerve, lateral cord of the brachial plexus, and C8 spinal nerve

This answer is incorrect.


The radial nerve does not typically provide sensation to the middle finger. C8 does not typically provide sensation to the middle finger.   (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. (ISBN:0702025127) Advertising:
2. Biller, J. (2005). Practical Neurology DVD Reveiew. Lippincott Williams & Wilkins, Philadelphia. (ISBN:0781757533) Advertising:
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anatomy
Sensory innervation of the upper extremity 03
Question ID: 01250805
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 01/25/2008
Modified: 01/25/2008
Estimated Permutations: 6283200

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