This one closes fairly early, usually by the time the baby is 2 months.
The posterior fontanel would be in the back of the head. The coronal fontanel would be located in another part of the brain.
Anterior (frontal) Fontanel Posterior (occipital) Fontanel Anterolateral (sphenoid) Fontanel Posterolateral (mastoid) Fontanel
Anterior (frontal) Fontanel Posterior (occipital) Fontanel Anterolateral (sphenoid) Fontanel Posterolateral (mastoid) Fontanel
posterior
6months
anterior fontanel is found between the frontal bone and two parietal bones
two "spots" generally combine to make up the larger spot. they are the posterior fontanel and the anterior fontanel
They gradually fuse, so that eventually there is no anterior fontanel (or posterior fontanel) either.
Fontanelle or Fontanel is the soft spot of an infant human skull between the cranial bones. The posterior fontanel closes on the first few months of life.
They are like this because the body, including the skull with the brain within, have to grow. Also, during birth, there are stresses that are applied to the skull and the fontanels allow flexibility. The long bones in the body also have features that allow for the same growth.
There are 3 fontanelles. The Anterior Fontanel, Mastoid Fontanel, and the Sphenoidal Fontanel
Infants have two soft openings within the skull called fontanels. These will usually close completely by about the 18 month of age.