Question

which of the following is not true about a positive babinski reflex? normal in newborns. abnormal in adults. flaring of the toes when the sole is stroked. a sign of injury to descending spinal tracts. when a peripheral nerve injury is suspected.

Explanation:

A positive Babinski reflex is normal in newborns as their nervous system is still developing. In adults, a positive Babinski (toes flaring when sole is stroked) is abnormal and often indicates injury to descending spinal tracts (upper motor neuron issues). Peripheral nerve injury (lower motor neuron) typically causes different signs like muscle weakness, atrophy, and hyporeflexia, not a positive Babinski.

Answer:

When a peripheral nerve injury is suspected.