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Anterior (frontal) Fontanel Posterior (occipital) Fontanel Anterolateral (sphenoid) Fontanel Posterolateral (mastoid) Fontanel
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.
Fontanel
Anterior (frontal) Fontanel Posterior (occipital) Fontanel Anterolateral (sphenoid) Fontanel Posterolateral (mastoid) Fontanel
Babies are born with six fontanels, or soft spots, on their skull. These fontanels allow for flexibility during birth and rapid brain growth in infancy. Over time, they gradually close as the baby's skull bones develop and fuse together.
6-24 months
sucka! your going to die!
The soft spots are called fontanelles. They occur at the fibrous sutures (joints) between the plates of the skull, and usually fuse with bone (ossify) within the first two years after birth. The spacing between the skull plates is necessary for proper expansion as the brain grows.
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.
The fontanelles are "soft spots" in the newborn's skull. These bones do not fuse completely before birth, so that the head can mold to fit through the birth canal. They also allow the brain to grow inside the skull with out increasing the intercranial pressure.Hope this helps.