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Spontaneous Activity on Needle EMG 02

Topic: Physiology

Created on Friday, January 26 2007 by jdmiles

Last modified on Friday, January 26 2007.

Of the following, which pattern of spontaneous activity on EMG represents the firing of muscle fibers (as opposed to motor units)?

 
        A) Cramps
 
        B) Enplate noise
 
        C) Neuromyotonia
 
        D) Fibrillation potentials
 
        E) Multiplets
 

 


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This question was created on January 26, 2007 by jdmiles.
This question was last modified on January 26, 2007.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) cramps

This answer is incorrect.


Cramps represent motor unit activity  (See References)

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B) enplate noise

This answer is incorrect.


Endplate noise represents miniature endplate potentials  (See References)

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C) neuromyotonia

This answer is incorrect.


Neuromyotonia represents motor unit activity  (See References)

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D) fibrillation potentials

This answer is correct.


Fibrillation potentials represent muscle fiber activity  (See References)

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E) multiplets

This answer is incorrect.


Multiplets represent motor unit activity  (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.
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physiology
Spontaneous Activity on Needle EMG 02
Question ID: 0126070001
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 01/26/2007
Modified: 01/26/2007
Estimated Permutations: 42000

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