In the adult Rule of Nines, what percentage is assigned to the head?

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Multiple Choice

In the adult Rule of Nines, what percentage is assigned to the head?

Explanation:
The main idea is that the Rule of Nines estimates burn size by assigning rough percentages to body regions so the total adds up to 100%. In adults, the head and neck together account for 9% of the total body surface area. This distribution—head/neck 9%, each arm 9%, each leg 18%, anterior trunk 18%, posterior trunk 18%, perineum 1%—is designed so the whole body sums to 100%. The head being 9% reflects its proportion in an adult’s body surface area; in contrast, in children the head is proportionally larger, around 18%. So for this question, the head is 9%.

The main idea is that the Rule of Nines estimates burn size by assigning rough percentages to body regions so the total adds up to 100%. In adults, the head and neck together account for 9% of the total body surface area. This distribution—head/neck 9%, each arm 9%, each leg 18%, anterior trunk 18%, posterior trunk 18%, perineum 1%—is designed so the whole body sums to 100%. The head being 9% reflects its proportion in an adult’s body surface area; in contrast, in children the head is proportionally larger, around 18%. So for this question, the head is 9%.

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