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Primitive Reflexes 2

Topic: Pediatric

Created on Saturday, January 16 2010 by jdmiles

Last modified on Saturday, January 16 2010.


Which of the following statements about the primitive reflex shown above is most accurate?

 
        A) This reflex typically has an flexor response at birth, and usually becomes extensor by 3 months of age
 
        B) This reflex typically has an extensor response at birth, and usually becomes flexor by 6 months of age
 
        C) This reflex typically has an extensor response at birth, and usually becomes flexor by 18 months of age
 
        D) This reflex typically has an flexor response at birth, and usually becomes extensor by 6 months of age
 
        E) This reflex typically has an extensor response at birth, and usually has no response after 6 months of age
 

 


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This question was created on January 16, 2010 by jdmiles.
This question was last modified on January 16, 2010.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ANSWERS AND EXPLANATIONS




A) This reflex typically has an flexor response at birth, and usually becomes extensor by 3 months of age

This answer is incorrect.


Sources vary regarding exact timing, but an extensor plantar response (or Babinski) is usually present at birth, and becomes flexor in the majority of children by about 6 months.   (See References)

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B) This reflex typically has an extensor response at birth, and usually becomes flexor by 6 months of age

This answer is correct.


Sources vary regarding exact timing, but an extensor plantar response (or Babinski) is usually present at birth, and becomes flexor in the majority of children by about 6 months.   (See References)

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C) This reflex typically has an extensor response at birth, and usually becomes flexor by 18 months of age

This answer is incorrect.


Sources vary regarding exact timing, but an extensor plantar response (or Babinski) is usually present at birth, and becomes flexor in the majority of children by about 6 months.   (See References)

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D) This reflex typically has an flexor response at birth, and usually becomes extensor by 6 months of age

This answer is incorrect.


Sources vary regarding exact timing, but an extensor plantar response (or Babinski) is usually present at birth, and becomes flexor in the majority of children by about 6 months.   (See References)

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E) This reflex typically has an extensor response at birth, and usually has no response after 6 months of age

This answer is incorrect.


Sources vary regarding exact timing, but an extensor plantar response (or Babinski) is usually present at birth, and becomes flexor in the majority of children by about 6 months.   (See References)

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References:

1. Kumhar, G.D., Dua, T., and Gupta, P. (2002). "Plantar response in infancy." Eur J Paediatr Neurol, 6(6) 321-5. (PMID:12401457)
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pediatric
Primitive Reflexes 2
Question ID: 011610235
Question written by J. Douglas Miles, (C) 2006-2009, all rights reserved.
Created: 01/16/2010
Modified: 01/16/2010
Estimated Permutations: 600
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