Babinski Reflex

One of the more known reflexes, even if not by name, is the Babinski reflex. The Babinski reflex occurs when the infant's lateral aspect on the plantar surface (outside sole) is stroked from heel to toe. The response to this stimulus is displayed by the infants toes extending outward. After birth, doctors use this reflex to test for neurological function.

Video of reflex¹ -- https://www.youtube.com/watch?v=oI_ONptx2Ns

The Babinski reflex is a primitive reflex, which connotes emergence at birth. Generally in normally developing infants this reflex disappears around four months of age. However, typically primitive reflexes weaken or modify within the first two weeks. Warning signs of an underlying neurological condition occurs when the reflex persists after six months or never appears at birth.²

Adult testing with explanation ³ --https://www.youtube.com/watch?v=kOq5Np0eZ6A


1. B. (2010). Babinski reflex / reaction of a baby. Retrieved July 29, 2016, from https://www.youtube.com/watch?v=oI_ONptx2Ns
2. Haywood, K., & Getchell, N. (2009). Life span motor development. Champaign, IL: Human Kinetics.
3. B. (2008). Babinski Reflex. Retrieved July 29, 2016, from https://www.youtube.com/watch?v=kOq5Np0eZ6A