What is the starting point of proximodistal growth?

Proximodistal growth refers to the developmental pattern in which growth and development proceed from the center of the body outward toward the extremities. This means that structures closest to the midline of the body, such as the trunk and arms, develop before those that are further away, like the fingers and toes. This principle is fundamental in understanding physical development in children, as it highlights how motor skills and physical abilities emerge in a specific sequence, starting from the core and moving outward. For example, infants typically gain control of their shoulders and arms before they can effectively control their hands and fingers. This pattern is a key concept in developmental psychology and biology, emphasizing the coordinated and systematic nature of growth.