fontanelles


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fontanelles

The gaps between the bones of the vault of the growing skull of the baby and young infant that can be felt, as soft depressions on the top of the head, by gentle pressure with the fingers. The front (anterior) fontanelle lies at the junction of the two forehead (frontal) bones and the two side (parietal) bones. The rear (posterior) fontanelle lies between the two parietal bones and the single rear occipital bone. The fontanelles are covered by scalp and skin and allow moulding of the skull during birth. Both have usually closed by about 14 months. There are two other very small fontanelles on either side of the head.
References in periodicals archive ?
1), (2) Cleidocranial dysostosis presents similarly to pycnodysostosis, with persistent open fontanelles and cranial sutures; however, it always involves the clavicle (a bone only rarely affected in pycnodysostosis) (1) and does not result in overall increased bone density.
Nasal fontanelles are the areas of the lateral nasal wall that are absent of bone.
In order to differentiate the fontanelles of the skull from those of the nasal cavity, the latter should be referred to as nasal fontanelles.
The anterior fontanelle has an important relationship to the nasolacrimal apparatus.
Unlike the anterior fontanelle, the posterior fontanelle serves as a relatively safe surgical landmark during a middle meatal antrostomy.