cephalocaudal

adjective

ceph·​a·​lo·​cau·​dal ˌsef-ə-lō-ˈkȯd-ᵊl 

: proceeding or occurring in the long axis of the body especially in the direction from head to tail

cephalocaudal development

The fat loss occurs during childhood or adolescence, affecting the face, neck, arms, thorax, and upper abdomen in a cephalocaudal fashion.

—Abhimanyu Garg, The New England Journal of Medicine

cephalocaudally

-ᵊl-ē 

adverb