Written by the Fiveable Content Team • Last updated August 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated August 2025
Definition
The Babinski reflex is a physical response where a baby's big toe moves upward or toward the top surface of the foot and the other toes fan out when the sole of the foot is firmly stroked.