The FrontalCortex question bank can help you study for the neurology boards.

Lower extremity muscle function and innervation 1

Topic: Pharmacology

Created on Monday, September 18 2006 by

Last modified on Monday, September 18 2006.




Which movement would be most affected by a lesion of the L3 and L4 spinal roots?

 
        A) Extension of the great toe
 
        B) Ankle dorsiflexion
 
        C) Knee extension
 
        D) Hip extension
 
        E) Knee flexion
 

 


Back to the question = Go back to the top of the page.
See another question like this one = Reload a different version of this question ().
Click here for a random question = Load a random question from the database.
Clone this question = Use this question as a template to create a totally NEW question.
Rate this question = Enter detailed rating for this question!
Average user rating for this question = 3 = How users like you have rated this question.
This question was created on September 18, 2006 by .
This question was last modified on September 18, 2006.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) extension of the great toe

This answer is incorrect.


L5 and S1 are the spinal segments which most strongly affect extension of the great toe.  (See References)

Back to the questionSee another question like this oneClick here for a random questionClone this question Rate this questionAverage user rating for this question = 3
Please log in if you want to rate questions.

 

 

 

 

 

 

 

 

 




B) ankle dorsiflexion

This answer is incorrect.


L4 is the spinal segment which most strongly affects ankle dorsiflexion.  (See References)

Back to the questionSee another question like this oneClick here for a random questionClone this question Rate this questionAverage user rating for this question = 3
Please log in if you want to rate questions.

 

 

 

 

 

 

 

 

 




C) knee extension

This answer is correct.


Knee extension is most strongly affected by the L3 and L4 spinal segments.  (See References)

Back to the questionSee another question like this oneClick here for a random questionClone this question Rate this questionAverage user rating for this question = 3
Please log in if you want to rate questions.

 

 

 

 

 

 

 

 

 




D) hip extension

This answer is incorrect.


L5 and S1 are the spinal segments which most strongly affect hip extension.  (See References)

Back to the questionSee another question like this oneClick here for a random questionClone this question Rate this questionAverage user rating for this question = 3
Please log in if you want to rate questions.

 

 

 

 

 

 

 

 

 




E) knee flexion

This answer is incorrect.


S1 is the spinal segment which most strongly affects knee flexion.  (See References)

Back to the questionSee another question like this oneClick here for a random questionClone this question Rate this questionAverage user rating for this question = 3
Please log in if you want to rate questions.

 

 

 

 

References:

1. Guarantors of Brain. (2000). Aids to the Examination of the Peripheral Nervous System, fourth edition. W.B. Saunders, Edinburgh.
Back to the questionSee another question like this oneClick here for a random questionClone this question Rate this questionAverage user rating for this question = 3
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
pharmacology
Lower extremity muscle function and innervation 1
Question ID: 69181
Question written by . (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 09/18/2006
Modified: 09/18/2006
Estimated Permutations: 0

User Comments About This Question: