Deciphering the Scientific Principle of "Hui Guang Fan Zhao"

People also experience the phenomenon of "false recovery" just before death. For example, a patient who has been in a coma for a long time suddenly becomes conscious and may even have a brief conversation with loved ones; a person who has lost their appetite and refused to eat or drink may suddenly want to eat. These "improvements" in condition are illusions, giving people the false impression that the patient is out of danger. However, experienced individuals know at a glance that this is a false recovery, a sign that the patient is saying goodbye to their loved ones. Why do people experience this false recovery just before death?