Anterior (frontal) Fontanel Posterior (occipital) Fontanel Anterolateral (sphenoid) Fontanel Posterolateral (mastoid) Fontanel
A fetal skull has six fontanels: two anterior (sagittal and frontal) and four posterior (two squamous and two mastoid). These membranous gaps eventually close as the skull bones fuse together during infancy.
Fontanel
They gradually fuse, so that eventually there is no anterior fontanel (or posterior fontanel) either.
The sphenoid bone does not form a border for a fontanel. Fontanels are soft spots on a baby's skull formed by the gaps between the skull bones.
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.
The anterior fontanel is the most dorsal fontanel, located at the intersection of the sagittal suture and the coronal suture on the top of the skull.
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.
If an infant's fontanel (the soft spot on the skull) closes too early, a condition known as craniosynostosis may occur. This can restrict the growth of the skull and potentially lead to increased intracranial pressure, affecting brain development. Early diagnosis and intervention, often surgical, are crucial to prevent complications and ensure proper skull and brain growth. It's important for pediatricians to monitor head shape and development during routine check-ups.