Spinal Cord Anatomy 01

Topic: Anatomy

Created on Wednesday, May 2 2007 by jdmiles

Last modified on Wednesday, May 2 2007.

 
        A) The cell bodies of these neurons are in the contralateral dorsal root ganglion
 
        B) The cell bodies of these neurons are in the ipsilateral dorsal root ganglion
 
        C) These are fibers that carry sensations of vibration and temperature from the left side of the body
 
        D) The cell bodies of these neurons are in the ipsilateral nucleus gracilis
 
        E) This is the fasciculus cuneatus
 

 

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This question was created on May 02, 2007 by jdmiles.
This question was last modified on May 02, 2007.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS

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A) the cell bodies of these neurons are in the contralateral dorsal root ganglion

This answer is incorrect.

The fiber tract highlighted in red is the left fasciculus gracilis. This carries sensations of light touch, vibration, and proprioception from the more inferior portions of the body, such as the lower extremities. The cell bodies for these neurons are in the ipsilateral dorsal root ganglion. They ascend ipsilaterally until they reach the nucleus gracilis in the medulla, where they will synapse onto the second-order neurons.  (See References)

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B) the cell bodies of these neurons are in the ipsilateral dorsal root ganglion

This answer is correct.

The fiber tract highlighted in red is the left fasciculus gracilis. This carries sensations of light touch, vibration, and proprioception from the more inferior portions of the body, such as the lower extremities. The cell bodies for these neurons are in the ipsilateral dorsal root ganglion. They ascend ipsilaterally until they reach the nucleus gracilis in the medulla, where they will synapse onto the second-order neurons.  (See References)

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C) these are fibers that carry sensations of vibration and temperature from the left side of the body

This answer is incorrect.

The fiber tract highlighted in red is the left fasciculus gracilis. This carries sensations of light touch, vibration, and proprioception from the more inferior portions of the body, such as the lower extremities. The cell bodies for these neurons are in the ipsilateral dorsal root ganglion. They ascend ipsilaterally until they reach the nucleus gracilis in the medulla, where they will synapse onto the second-order neurons. Temperature is carried by fibers of the anterolateral system.  (See References)

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---

D) the cell bodies of these neurons are in the ipsilateral nucleus gracilis

This answer is incorrect.

The fiber tract highlighted in red is the left fasciculus gracilis. The cell bodies for these neurons are in the ipsilateral dorsal root ganglion. They ascend ipsilaterally until they reach the nucleus gracilis in the medulla, where they will synapse onto the second-order neurons.  (See References)

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---

E) this is the fasciculus cuneatus

This answer is incorrect.

The fiber tract highlighted in red is the left fasciculus gracilis.  (See References)

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References:

1. Moore, K.L. (1992). Clinical Oriented Anatomy, 3rd Edition. Williams & Wilkins, Baltimore.
2. Walter J. Hendelman. . Philadelphia : W.B. Saunders, c1994. (ISBN:0721654282)	Advertising:
3. Nolte, J. (1993). The Human Brain: An Introduction to Its Functional Anatomy. Mosby, St. Louis.
4. James D. Fix. . Rockville, Md. : Aspen Publishers, 1987. (ISBN:0871898586)	Advertising:
5. Duane E. Haines. Neuroanatomy: an atlas of structures, sections, and systems. Philadelphia : Lippincott Williams & Wilkins, c2000. (ISBN:0683306499)	Advertising:
6. Stephen J. DeArmond, Madeline M. Fusco, Maynard M. Dewey. Structure of the human brain: a photographic atlas. New York : Oxford University Press, 1989. (ISBN:019504357x)	Advertising:
7. Stephen Goldberg. . Miami : MedMaster, c2000. (ISBN:0940780461)	Advertising:
8. David L. Felten, Ralph F., Md. Jozefowicz, Frank H., Md. Netter, . . ICON Learning Systems (ISBN:1929007167)	Advertising:
9. James Fix. High-Yield Neuroanatomy (High-Yield). Lippincott Williams & Wilkins (ISBN:0683307215)	Advertising:
10. Duane E., Ph.D. Haines, . Neuroanatomy: An Atlas of Structures, Sections, and Systems. Lippincott Williams & Wilkins (ISBN:0781746779)	Advertising:
11. by Frank H. Netter; Arthur F. Dalley II, consulting editor. . East Hanover, N.J. : Novartis, c1997. (ISBN:0914168819)

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anatomy
Spinal Cord Anatomy 01
Question ID: 050207180
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 05/02/2007
Modified: 05/02/2007
Estimated Permutations: 25200