Personal Identity is a major topic in metaphysics and philosophy of mind concerned with the continuity of a person across time. Philosophical inquiry asks whether personal identity depends primarily on the body, the brain, memory, consciousness, psychological continuity, a persistent self, or some combination of these factors. The topic connects closely with identity, consciousness, mind, change, time, substance, and the Mind-Body Problem, especially when examining what must remain continuous for an individual to be considered the same person through changing circumstances and experiences.