c7f1ccc7___open_books_for_an_open_world__Response
[Reflex] Moro [Stimulation] Hold infant in a cradling horizontal position and slightly lower the baby in a fast motion toward the ground while making a loud sound. [Age of disappearance] 6 months [Function] In the evolutionary past this may have helped the baby cling to the mother. [Response] 
The baby will make a embracing motion and arch its back extending it's legs and throwing it's arms outward. Finally it will bring the arms in toward its body
Human Physiology/Print Version - Wikibooks, open books for an open world