During infancy, which fontanel closes first?

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Multiple Choice

During infancy, which fontanel closes first?

Explanation:
The main idea is that fontanels are soft gaps between skull bones that allow brain growth and childbirth molding, and they close as bones fuse over time. The posterior fontanel, at the back of the head, is smaller and tends to ossify earlier than the front. Because of this, it closes sooner—typically by around 2 to 3 months, and by about 4 months in some infants—making it the first to seal during infancy. The anterior fontanel, located on the top-front of the skull, remains open much longer to accommodate continued brain growth, usually closing around 12 to 18 months (and often by about 2 years). So the posterior fontanel is the first to close, which is why the option stating that it closes around 4 months fits the idea of its earlier closure compared to the anterior fontanel.

The main idea is that fontanels are soft gaps between skull bones that allow brain growth and childbirth molding, and they close as bones fuse over time. The posterior fontanel, at the back of the head, is smaller and tends to ossify earlier than the front. Because of this, it closes sooner—typically by around 2 to 3 months, and by about 4 months in some infants—making it the first to seal during infancy. The anterior fontanel, located on the top-front of the skull, remains open much longer to accommodate continued brain growth, usually closing around 12 to 18 months (and often by about 2 years). So the posterior fontanel is the first to close, which is why the option stating that it closes around 4 months fits the idea of its earlier closure compared to the anterior fontanel.

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