Posterior Fontanelle Closure Age
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The sutures and fontanelles are needed for the infant s brain growth and development.
Posterior fontanelle closure age. The fontanel can enlarge in the first few months of life 18 and the median age of closure is 13 8 months. The posterior fontanelle is located between the pair of parietal bones and the occipital bone. This fontanelle is at the intersection of three different bones.
Other than the anterior and posterior fontanelles the mastoid fontanelle and the sphenoidal fontanelle are also significant. The posterior fontanelle generally closes 2 months after birth and the anterior fontanelle by 2 years of age in almost all infants 4. The sphenoidal and posterior fontanelles close during the first few months of life.
If fontanels close too early or too late that may be a sign of a problem. The posterior fontanelle is on the upper rear part of the baby s head. Fontanelle and suture closure occurs in a specific pattern table 1 and table 2.
In humans the sequence of fontanelle closure is as follows. The posterior fontanelle generally closes between 6 weeks and 3 months after birth. The anterior fontanel closes at 18 months of age on the average but it can close normally as early as 9 months.
The fontanelle in the back of the head posterior fontanelle most often closes by the time an infant is 1 to 2 months old. It is the first to close. The closures eventually form the sutures of the neurocranium.
There are two sphenoid fontanelles on either side of the. In addition to these two larger sized fontanelles there are four smaller fontanelles along the. The fontanelle at the top of the head anterior fontanelle most often closes between 7 to 19 months.
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