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Motor tracts 1

Topic: Anatomy

Created on Thursday, August 31 2006 by jdmiles

Last modified on Wednesday, December 31 1969.

Which of the following is a major function subserved by the Lateral Corticospinal Tract?

 
        A) Control of neck, shoulder, and upper trunk muscles, as well as coordination of head and eye movements
 
        B) Fine control of muscles of the body
 
        C) Motor control, with more effect over flexor than extensor muscles
 
        D) Inhibiting tone of axial muscles
 
        E) Cortical control of motor cranial nerves
 

 


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This question was created on August 31, 2006 by jdmiles.
This question was last modified on December 31, 1969.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) control of neck, shoulder, and upper trunk muscles, as well as coordination of head and eye movements

This answer is incorrect.


The function 'control of neck, shoulder, and upper trunk muscles, as well as coordination of head and eye movements' is primarily served by the Tectospinal Tract.  (See References)

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B) fine control of muscles of the body

This answer is correct.


The major function of the Lateral Corticospinal Tract is fine control of muscles of the body.  (See References)

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C) motor control, with more effect over flexor than extensor muscles

This answer is incorrect.


The function 'motor control, with more effect over flexor than extensor muscles' is primarily served by the Rubrospinal Tract.  (See References)

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D) inhibiting tone of axial muscles

This answer is incorrect.


The function 'inhibiting tone of axial muscles' is primarily served by the Lateral Reticulospinal Tract.  (See References)

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E) cortical control of motor cranial nerves

This answer is incorrect.


The function 'cortical control of motor cranial nerves' is primarily served by the Lateral Corticobulbar Tract.  (See References)

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References:

1. Purves, D., Augustine, G.J., Fitzpatrick, D., Katz, L.C., Lamantia, A., McNamara, J.O., Williams, S.M. (Editors). (2004). Neuroscience. Sinauer Associates, Inc. Sunderland, MA. (ISBN:0878937250)Advertising:
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anatomy
Motor tracts 1
Question ID: 901200601
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 08/31/2006
Modified: 12/31/1969
Estimated Permutations: 0

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