A rocker bottom foot (also known as a congenital vertical talus) is a congenital anomaly of the foot in which the sole of a child's foot flexes abnormally in a convex position giving the foot a rocker-bottom appearance. For this reason, this condition is often called rocker-bottom foot. Credits: https://www.instagram.com/p/CRyXklUhlIa/?utm_medium=copy_link