Visual Evoked Potentials 01

Topic: Physiology

Created on Wednesday, October 17 2007 by jdmiles

Last modified on Wednesday, October 17 2007.

 
        A) When combined with an electroretinogram, VEPs can help differentiate retinal lesions from optic nerve lesions
 
        B) VEPs are helpful in identifying the etiology of a lesion
 
        C) N50 is the most useful and reproducible wave
 
        D) N120 is the most useful and reproducible wave
 
        E) VEPs are obtained by stimulating the retina with light while recording electrical activity from the cornea
 

 

	= Go back to the top of the page.
	= Reload a different version of this question ().
	= Load a random question from the database.
	= Use this question as a template to create a totally NEW question.
	= Enter detailed rating for this question!
	= How users like you have rated this question.

This question was created on October 17, 2007 by jdmiles.
This question was last modified on October 17, 2007.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS

---

A) When combined with an electroretinogram, VEPs can help differentiate retinal lesions from optic nerve lesions

This answer is correct.

When combined with an electroretinogram, VEPs can help differentiate retinal lesions from optic nerve lesions.  (See References)

Please log in if you want to rate questions.

 

 

 

 

 

 

 

 

 

---

B) VEPs are helpful in identifying the etiology of a lesion

This answer is incorrect.

VEPs are helpful in detecting the presence of a lesion, but do not provide direct evidence as to the etiology of a lesion.  (See References)

Please log in if you want to rate questions.

 

 

 

 

 

 

 

 

 

---

C) N50 is the most useful and reproducible wave

This answer is incorrect.

P100 is the most useful and reproducible of the VEP waveforms.  (See References)

Please log in if you want to rate questions.

 

 

 

 

 

 

 

 

 

---

D) N120 is the most useful and reproducible wave

This answer is incorrect.

P100 is the most useful and reproducible of the VEP waveforms.  (See References)

Please log in if you want to rate questions.

 

 

 

 

 

 

 

 

 

---

E) VEPs are obtained by stimulating the retina with light while recording electrical activity from the cornea

This answer is incorrect.

Electroretinograms are obtained by stimulating the retina with light while recording electrical activity from the cornea.  VEPs are obtained by recording from scalp electrodes placed over the occipital cortex, while having the subject observe visual stimuli such as a varying black and white checkerboard pattern.  (See References)

Please log in if you want to rate questions.

 

 

 

 

References:

1. Zaidat, O.O., and Lerner, A.J. (2002). The Little Black Book of Neurology, 4th Edition. Mosby, St. Louis (ISBN:0323014151)

Advertising:

Please log in if you want to rate questions.

 

FrontalCortex.com -- Neurology Review Questions -- Neurology Boards -- Board Review -- Residency Inservice Training Exam -- RITE Exam Review
physiology
Visual Evoked Potentials 01
Question ID: 101707066
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 10/17/2007
Modified: 10/17/2007
Estimated Permutations: 1092000