the anterior fontanelle closes in babies at eight weeks.
the anterior fontanelle closes in babies at eight weeks.
when does the anterior fontanelle close in babies?
eight weeks
during birth, fontanelles enable the bony plates of the skull to flex, allowing the child's head to pass through the birth canal. the ossification of the bones of the skull causes the anterior fontanelle to close over by 9 to 18 months. the sphenoidal and posterior fontanelles close during the first few months of life. the closures eventually form the sutures of the neurocranium. other than the anterior and posterior fontanelles, the mastoid fontanelle and the sphenoidal fontanelle are also significant.









































section::::structure.:closure.









































in humans, the sequence of fontanelle closure is as follows:
fontanelle
anterior fontanelle









































the anterior fontanelle (bregmatic fontanelle, frontal fontanelle) is the largest fontanelle, and is placed at the junction of the sagittal suture, coronal suture, and frontal suture; it is lozenge-shaped, and measures about 4 cm in its antero-posterior and 2.5 cm in its transverse diameter. the fontanelle allows the skull to deform during birth to ease its passage through the birth canal and for expansion of the brain after birth.









































the anterior fontanelle typically closes between the ages of 12 and 18 months.









































section::::clinical significance.
anterior fontanelle