Infants will also show an extensor response. A baby's smaller toes will fan out and their big toe will dorsiflex slowly. This happens because the corticospinal pathways that run from the brain down the spinal cord are not fully myelinated at this age, so the reflex is not inhibited by the cerebral cortex. The extensor response disappears and gives way to the flexor response around 12-24 months of age.
Infants will also show an extensor response. A baby's smaller toes will fan out and their big toe will dorsiflex slowly. This happens because the corticospinal pathways that run from the brain down the spinal cord are not fully myelinated at this age, so the reflex is not inhibited by the cerebral cortex. The extensor response disappears and gives way to the flexor response around 12-24 months of age.
So the reflex is not inhibited by corticospinal pathway (by stretch reflex I guess)
Is it due to slow conduction!
but even though this tract is responsible for voluntary movement.
then again how? :toosad::toosad:
lol.. yes u're rite. sorry. i should've said 12 to 18 months. that's the usual interval given. but 12 - 14 months is correct too. some books give a longer interval. however, if up till 2 yrs it is positive it shouldn't be considered abnormal until proven otherwise.
Babinski sign its normal in children bc the pyramidal tract still not mature
so its gives a + sign its planter reflex in nature and the center of it is (S1,S2)
Most newborn babies are not neurologically mature so they normally show a Babinski sign.
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