Motor tracts 1

Topic: Anatomy

Created on Thursday, August 31 2006 by jdmiles

Last modified on Wednesday, December 31 1969.

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

 

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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

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

This answer is correct.

The major function of the Rubrospinal Tract is motor control, with more effect over flexor than extensor muscles.  (See References)

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B) control of head and eye movements

This answer is incorrect.

The function 'control of head and eye movements' is primarily served by the Medial Vestibulospinal Tract.  (See References)

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C) 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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D) control of muscles of the neck, shoulder, and upper trunk

This answer is incorrect.

The function 'control of muscles of the neck, shoulder, and upper trunk' is primarily served by the Ventral Corticospinal Tract.  (See References)

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E) facilitating tone of axial extensor muscles

This answer is incorrect.

The function 'facilitating tone of axial extensor muscles' is primarily served by the Medial Reticulospinal 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)

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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