Human growth can be described as occuring in a cephalocaudal pattern. That means that it starts in the head, and then spreads to lower extremeties.
The head is the starting place, and then the rest of the growth goes from there. The same thing is true for children. Physical growth is consistently measured as occurring from the head down. Makes sense that this top-down patter applies to the types of growth opportunities us adults face.
It’s always cephalocaudal.