Which statement about pediatric head size is true?

Which statement about pediatric head size is true?

• A. Children have longer legs than arms.
• B. Children have smaller heads relative to body size than adults.
• C. Children have proportionately larger heads than adults.
• D. Head size is the same proportion as adults.

Answer: (C)

In kids, the head is relatively larger compared with the rest of the body because the brain grows rapidly in early development and the skull is still growing—the sutures and fontanelles allow that expansion. As children grow, their bodies lengthen and the head-to-body ratio decreases, so adults have a smaller head relative to their body size. This makes the statement that children have proportionately larger heads than adults true. The other ideas aren’t about head size: limb length comparisons don’t address head proportion, and saying the head is smaller or the proportions are the same as in adults contradicts the actual growth pattern seen in pediatric development.

In kids, the head is relatively larger compared with the rest of the body because the brain grows rapidly in early development and the skull is still growing—the sutures and fontanelles allow that expansion. As children grow, their bodies lengthen and the head-to-body ratio decreases, so adults have a smaller head relative to their body size. This makes the statement that children have proportionately larger heads than adults true.

The other ideas aren’t about head size: limb length comparisons don’t address head proportion, and saying the head is smaller or the proportions are the same as in adults contradicts the actual growth pattern seen in pediatric development.