: An infant's brain nearly doubles in size during the first year; the open fontanelles provide the necessary space for the skull to expand rapidly. Sunken fontanel: Causes, picture, and complications
: These gaps allow the skull bones to overlap (molding) during delivery, helping the baby's head pass safely through the narrow birth canal. soft spot
Nature's "collapsible helmet" design serves two primary purposes: : An infant's brain nearly doubles in size