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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 body dysmorphic disorder. Your brilliant but misunderstood surgeon recommends general anesthesia for a breast augmentation.
When you awaken, he proudly announces, "Congratulations! I have successfully severed your upper trunk of your brachial plexus!"
You are rather dumbfounded.

On needle EMG, when will you be able to find fibrillations in intrinsic muscles of the hand?

 
        A) Never
 
        B) 4 to 6 weeks
 
        C) Several months
 
        D) 7 to 10 days
 
        E) 10 to 14 days
 

 


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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) never

This answer is correct.


The upper trunk of the brachial plexus does not typically provide innervation to the intrinsic muscles of the hand.  (See References)

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B) 4 to 6 weeks

This answer is incorrect.


The upper trunk of the brachial plexus does not typically provide innervation to the intrinsic muscles of the hand.  (See References)

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C) several months

This answer is incorrect.


The upper trunk of the brachial plexus does not typically provide innervation to the intrinsic muscles of the hand.  (See References)

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D) 7 to 10 days

This answer is incorrect.


The upper trunk of the brachial plexus does not typically provide innervation to the intrinsic muscles of the hand.  (See References)

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E) 10 to 14 days

This answer is incorrect.


The upper trunk of the brachial plexus does not typically provide innervation to the intrinsic muscles of the hand.  (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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