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Time Course of EMG/NCS Findings

Topic: Pharmacology

Created on Tuesday, January 16 2007 by

Last modified on Thursday, January 25 2007.

Sadly, you suffer from onychomycosis. Your malicious surgeon recommends general anesthesia for a really intense cleaning of the toenails.
When you awaken, he proudly announces, "Congratulations! I have successfully severed your lower trunk of your brachial plexus!"
You are displeased.

On needle EMG, when will you be able to find fibrillations in the deltoid?

 
        A) 7 to 10 days
 
        B) 2 to 3 weeks
 
        C) 4 to 6 weeks
 
        D) Never
 
        E) 3 to 4 weeks
 

 


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This question was created on January 16, 2007 by .
This question was last modified on January 25, 2007.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) 7 to 10 days

This answer is incorrect.


The lower trunk of the brachial plexus does not typically provide innervation to the deltoid.  (See References)

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B) 2 to 3 weeks

This answer is incorrect.


The lower trunk of the brachial plexus does not typically provide innervation to the deltoid.  (See References)

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C) 4 to 6 weeks

This answer is incorrect.


The lower trunk of the brachial plexus does not typically provide innervation to the deltoid.  (See References)

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D) never

This answer is correct.


The lower trunk of the brachial plexus does not typically provide innervation to the deltoid.  (See References)

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E) 3 to 4 weeks

This answer is incorrect.


The lower trunk of the brachial plexus does not typically provide innervation to the deltoid.  (See References)

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References:

1. Preston, D.C., and Shapiro, B.E. (2005). Electromyography and Neuromuscular Disorders: Clinical-Electrophysiologic Correlations, 2nd Edition. Elsevier, Philadelphia.
2. Guarantors of Brain. (2000). Aids to the Examination of the Peripheral Nervous System, fourth edition. W.B. Saunders, Edinburgh.
3. Moore, K.L. (1992). Clinical Oriented Anatomy, 3rd Edition. Williams & Wilkins, Baltimore.
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pharmacology
Time Course of EMG/NCS Findings
Question ID: 01160700
Question written by . (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 01/16/2007
Modified: 01/25/2007
Estimated Permutations: 0

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