What indicates a normal Babinski reflex response in an infant?

The normal Babinski reflex in infants is characterized by the big toe being dorsiflexed (bending upward) while the other toes flare outward. This reflex is typically observed when the sole of an infant's foot is stroked, and it serves as an important indicator of neurological function. The presence of this reflex in infants, which generally disappears around 12 months of age as the nervous system matures, indicates that the pathways from the skin receptors to the central nervous system are intact.

The other responses do not represent the Babinski reflex. Curling of the toes forward would suggest a different reflex response, while tightly curled fingers or an infant turning to the side that is touched are unrelated neurological responses. Thus, understanding the specific characteristics of the Babinski reflex helps in assessing infant developmental milestones and neurological status.