The test consists of stroking the outside sole from heel to toe with a pointed object. The normal response is a bunching downward (flexor) movement of all the toes. In infants under 2 years of age and people with dysfunction in the corticospinal tract, this causes an upward (extensor) movement of the big toe.
Babinski's reflex can occur unilaterally (in just one foot) or bilaterally (in both feet).
A positive Babinski's reflex is consistent with several neurological conditions, including multiple sclerosis.
Babinski's reflex links:
Multiple Sclerosis- Movies