At about what age does the Babinski sign disappear?
a. 4 months
b. 6 months
c. 1 year
d. 2 years
ANS: C
The presence of the Babinski reflex after about age 1 year, when walking begins, is abnormal. Four to 6 months is too young for the disappearance of the Babinski reflex. Persistence of the Babinski reflex requires further evaluation.
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