OverviewFontanelles are the "soft spots" on an infant's head where the bony plates that make up the skull have not yet come together. It is normal for infants to have these "soft spots", which can be seen and felt on the top and back of the head. Fontanelles that are abnormally large may indicate a medical condition.
Update Date 2/9/2015
Updated by: Robert A. Cowles, MD, Pediatric Surgeon, Associate Professor of Surgery, Yale University School of Medicine, New Haven, CT. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.