In the newborn |skull|, the |frontal bone| and |parietal bones| are not yet solidly sutured. Between these bones is located a cartilaginous membrane, called the anterior fontanelle. In the newborn, this ~cartilage~ is still quite flexible, and the pulse may be seen on the surface of the head at this site. The anterior fontanelle does not close completely, forming the intersection between the coronal and sagittal sutures, until the second year of life.
