The Babinski reflex typically disappears by which age?

The Babinski reflex typically disappears by which age?

• A. 6 months
• B. 12 months
• C. 18 months
• D. 24 months

Answer: (B)

Primitive reflex integration and maturation of motor control are being assessed. In newborns, stroking the sole often elicits the Babinski response—toe dorsiflexion with toe fanning—because the corticospinal system isn’t fully inhibitory yet. As the nervous system matures and the pathways become more myelinated, the cortex gains greater control over spinal reflexes, and this primitive response is inhibited. By about twelve months of age, the Babinski reflex has typically disappeared, with normal reflexive response becoming plantar flexion of the toes when the sole is stroked. If the reflex persists beyond this age, especially after two years, it can indicate potential neurologic concerns.

Primitive reflex integration and maturation of motor control are being assessed. In newborns, stroking the sole often elicits the Babinski response—toe dorsiflexion with toe fanning—because the corticospinal system isn’t fully inhibitory yet. As the nervous system matures and the pathways become more myelinated, the cortex gains greater control over spinal reflexes, and this primitive response is inhibited. By about twelve months of age, the Babinski reflex has typically disappeared, with normal reflexive response becoming plantar flexion of the toes when the sole is stroked. If the reflex persists beyond this age, especially after two years, it can indicate potential neurologic concerns.