When a patient has a fever, which of the following thermoregulatory mechanisms is activated?

A 15-year-old male is brought to the ER for treatment of injuries received in a motor vehicle accident. An MRI reveals spinal cord injury, and his body temperature fluctuates markedly. The most accurate explanation of this phenomenon is that:

A child presents to his primary care provider with disorientation, delirium, aggressiveness, and stupor. His parents report that he was recently ill with an upper...