Zoe MCQ 08

Topic: Anatomy

Created on Saturday, November 26 2022 by zoe

Last modified on Saturday, November 26 2022.

 
        A) Third-order fibers arising in the VPL of the thalamus ascend through the internal capsule
 
        B) The posterior column-medial lemniscus pathway is responsible for temperature.
 
        C) The posterior column-medial lemniscus pathway is responsible for carrying tactile and proprioceptive information.
 
        D) Posterior column fibers that reach the brainstem synapse in nucleus gracilis or nucleus cuneatus (the posterior column nuclei) in the caudal medulla
 

 

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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

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A) Third-order fibers arising in the VPL of the thalamus ascend through the internal capsule

This answer is incorrect.

Third-order fibers arising in the thalamus (specifically in the ventral posterolateral nucleus of the thalamus, or VPL) ascend through the internal capsule to synapse mainly in the primary somatosensory cortex of the postcentral gyrus  (See References)

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B) The posterior column-medial lemniscus pathway is responsible for temperature.

This answer is correct.

Temperature is carried by the spinothalamic tract.   (See References)

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C) The posterior column-medial lemniscus pathway is responsible for carrying tactile and proprioceptive information.

This answer is incorrect.

The posterior column-medial lemniscus pathway is responsible for carrying tactile and proprioceptive information.  (See References)

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D) Posterior column fibers that reach the brainstem synapse in nucleus gracilis or nucleus cuneatus (the posterior column nuclei) in the caudal medulla

This answer is incorrect.

This is true. Posterior column fibers that reach the brainstem synapse in nucleus gracilis or nucleus cuneatus (the posterior column nuclei) in the caudal medulla  (See References)

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References:

1. Nolte Chapter 10: Page 235.

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anatomy
Zoe MCQ 08
Question ID: 112622080
Question written by zoe. (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 11/26/2022
Modified: 11/26/2022
Estimated Permutations: 24