Direct answer: There is no scientifically validated evidence that a person’s brain remains active for exactly seven minutes after death as a universal rule. What is documented in research is that after the heart stops, brain cells can remain metabolically active for a short period (often minutes) and may exhibit transient electrical activity in some cases. This has been studied in the context of near-death experiences and late-stage brain activity, but the idea of a fixed seven-minute window or a uniform “seven minutes of consciousness” is not established as fact. Different studies report varying timings and interpretations, and the phenomenon is highly dependent on factors such as the cause of death, whether CPR or other interventions occur, and individual physiology. If you’re exploring this for science, philosophy, or personal reasons, it’s best to distinguish between observed physiological processes (which can include brief neural activity after circulatory arrest) and the anecdotal or interpreted experiences (like life review or near-death experiences) that people report, which are not proven to be universal or causally linked to a precise time frame. If you want, I can gather and summarize recent scientific findings from credible sources on brain activity after cardiac arrest, the timing of neuronal death, and the evidence surrounding near-death experiences, with citations.