A mother of a 2-month-old is worried about a "soft spot" on the top of her infant's head. The nurse informs her that this is a normal physical finding called the anterior fontanelle, and that it will remain open until:
1. 2–3 months of age.
2. 6–9 months of age.
3. 12–18 months of age.
4. Approximately 2 years of age.
3
Rationale:
1. The anterior fontanelle is located at the top of the head, and is the opening at the intersection of the suture lines. As the infant grows, the suture lines begin to fuse, and the anterior fontanelle closes at about 12–18 months of age.
2. The anterior fontanelle is located at the top of the head, and is the opening at the intersection of the suture lines. As the infant grows, the suture lines begin to fuse, and the anterior fontanelle closes at about 12–18 months of age.
3. The anterior fontanelle is located at the top of the head, and is the opening at the intersection of the suture lines. As the infant grows, the suture lines begin to fuse, and the anterior fontanelle closes at about 12–18 months of age.
4. The anterior fontanelle is located at the top of the head, and is the opening at the intersection of the suture lines. As the infant grows, the suture lines begin to fuse, and the anterior fontanelle closes at about 12–18 months of age.
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