Explain: Terminal lucidity (final clarity), also known as "One last goodbye" in Oriental medicine, Buddhism calls it "Returning light reflection". It is a condition in which a patient who has been sick for a long time suddenly becomes healthy and alert, Oriental medicine calls it a false spirit for a short period of time from a few hours to a few days before death.
This phenomenon currently has no specific scientific evidence. There is a study published on pubmed, people followed up on patients with neurological diseases such as Alzheimer's and it is true that the above phenomenon occurs. Simply put, the body senses death and then concentrates all remaining strength into a short period of time.