单选题 An 8-month-old boy is admitted to the pediatric unit following a fall from his high chair. The child is awake, alert, and crying. The nurse should know that a brain injury is more severe in children because of（）

A、 increased myelination.
B、 intracranial hypotension.
C、 cerebral hyperemia.
D、 a slightly thicker cranium.

【正确答案】 C

【答案解析】Cerebral hyperemia (excess blood in the brain) causes an initial increase in intracranial pressure in the head of an injured child. The brain is less myelinated in a child and more easily injured than an adult brain. Intracranial hypertension--not hypotension-- places the child at greater risk for secondary brain injury. A child’s cranium is thinner and more pliable, causing the child to receive a more severe injury.