At what age does the anterior fontanelle typically close in toddlers?

At what age does the anterior fontanelle typically close in toddlers?

• A. 12 months
• B. 18 months
• C. 24 months
• D. 36 months

Answer: (B)

Fontanelles are gaps between skull bones that allow for brain growth in infancy. The anterior fontanelle, the larger diamond-shaped soft spot on top of the head, stays open during early life and typically closes around 18 months as the skull bones fuse. Some children may close a bit earlier or later, but around 18 months is the common timeline. By about 2 years, most have closed. If closure happens significantly earlier or much later than this window, it can prompt further evaluation for other conditions.

Fontanelles are gaps between skull bones that allow for brain growth in infancy. The anterior fontanelle, the larger diamond-shaped soft spot on top of the head, stays open during early life and typically closes around 18 months as the skull bones fuse. Some children may close a bit earlier or later, but around 18 months is the common timeline. By about 2 years, most have closed. If closure happens significantly earlier or much later than this window, it can prompt further evaluation for other conditions.