Posterior Fontanelle Closure Time

The neurocranium can be divided into the membranous neurocranium and the cartilaginous neurocranium.

Posterior fontanelle closure time. The most common causes of a large anterior fontanel or delayed fontanel clo. The word fontanel is derived from the latin fonticulus and the old french fontaine meaning a little fountain or spring 1 3 the normal fontanel varies widely in shape and time of closure. During childbirth the flexibility of the sutures allows the bones to overlap so.

The fontanelles should feel firm and very slightly curved inward to the touch. 1 posterior fontanelle generally closes 2 3 months after birth 2 sphenoidal fontanelle is the next to close around 6 months after birth 3 mastoid fontanelle closes next from 6 18 months after birth and 4 the anterior fontanelle is generally the last to close between 1 3 years. Time taken after birth for the fontanelles to close the a nterior fontanelle takes the longest time after birth to close.

In humans the sequence of fontanelle closure is as follows. These smaller gaps known as the. The fontanelle in the back of the head posterior fontanelle most often closes by the time an infant is 1 to 2 months old.

These fontanelles typically close by the time your baby is six months old. The posterior fontanelle usually closes by age 1 or 2 months. The sutures and fontanelles are needed for the infant s brain growth and development.

The anterior fontanelle usually closes sometime between 9 months and 18 months. The fontanelle at the top of the head anterior fontanelle most often closes between 7 to 19 months. The average size of the anterior fontanel is 2 1 cm and the median time of clo sure is 13 8 months.

The posterior fontanelle generally closes between 6 weeks and 3 months after birth. The closures eventually form the sutures of the neurocranium. It will take between 12 to 18 months for the sutures to solidify here.