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Zoe MCQ 09

Topic: Anatomy

Created on Saturday, November 26 2022 by zoe

Last modified on Saturday, November 26 2022.

45 year-old patient presents for a routine neurological exam. Using a pin, he is able to feel a sharp sensation to all his extremities. This is carried by the spinothalamic tract. Which of the following is FALSE regarding the spinothalamic tract?

 
        A) Thalamic cells project to the somatosensory cortex of the postcentral gyrus.
 
        B) First-order neurons are in the dorsal root ganglion
 
        C) Second-order neurons then synapse to the dorsal horn of the spinal cord and decussate
 
        D) On the contralateral side, it ascends to the VPL nucleus of the thalamus where it decussates again.
 

 


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This question was created on November 26, 2022 by zoe.
This question was last modified on November 26, 2022.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) Thalamic cells project to the somatosensory cortex of the postcentral gyrus.

This answer is incorrect.


This is true. Thalamic cells project to the somatosensory cortex of the postcentral gyrus.   (See References)

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B) First-order neurons are in the dorsal root ganglion

This answer is incorrect.


This is true. All first-order neurons are in the dorsal root ganglion.  (See References)

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C) Second-order neurons then synapse to the dorsal horn of the spinal cord and decussate

This answer is incorrect.


This is true. Second-order neurons then synapse to the dorsal horn of the spinal cord and decussate  (See References)

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D) On the contralateral side, it ascends to the VPL nucleus of the thalamus where it decussates again.

This answer is correct.


On the contralateral side, it ascends to the VPL nucleus of the thalamus. It does not decussate again.  (See References)

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References:

1. Nolte Chapter 10: Page 237
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anatomy
Zoe MCQ 09
Question ID: 112622081
Question written by zoe. (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 11/26/2022
Modified: 11/26/2022
Estimated Permutations: 24

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