A pediatrician is assessing a one-week-old infant. To check the infant's responses, the doctor gently and safely creates the sensation that the infant is falling. The infant responds by flinging out its arms and legs, then quickly pulling them back toward its body. Which automatic response is the infant demonstrating?

A pediatrician is assessing a newborn. During the examination, the doctor gently allows the baby's head to momentarily dip slightly, creating a sensation of falling. The newborn responds by flinging its arms out to the sides and then quickly pulling them back in toward its chest. Which reflex is the infant demonstrating?