The Babinski reflex is a newborn reflex in which the big toe bends upward and the other toes fan out when the sole of the foot is firmly stroked. It is normal in babies and usually disappears between 1 and 2 years of age.
Key takeaways
- Doctors check it as part of the newborn neurological exam.
- It fades as the nervous system matures and the child starts walking.
- In older children and adults it can be a sign of a nerve problem.
When to talk to your doctor
Your doctor will check this reflex at routine examinations; mention it if your child still shows it after age 2 or if it looks different on each side.
Frequently asked questions
You may see it when you stroke your baby's sole, but there is no need to test it; leave assessment to your doctor.