The period is defined by physiology-guided critical care, integrating intracranial dynamics, cerebral perfusion, and systemic fluid management into decision-making. Researchers increasingly rely on quantitative physiologic measurements—intracranial pressure, regional cerebral blood flow, cerebral metabolic rate of oxygen, autoregulation, and carbon dioxide reactivity—to anticipate deterioration and guide interventions. Fluid resuscitation science for burns and a growing appreciation for the limits of aggressive treatment drive more nuanced, physiologically informed management.