Posterior Fontanelle

Last updated: Sep 6th, 2024

The posterior fontanelle is one of two areas of an infant's head where the skull bones have not completely covered the brain. It is also known as one of the soft spots. The posterior fontanelle is located at the upper back part of the head. The posterior fontanelle has usually disappeared (because the plates of the skull grow and fuse together) by the time the infant is four months old.