When nearing death, some people with cognitive decline may experience a phenomenon known as terminal lucidity. According to a review published in Archives of Gerontology and Geriatrics, doctors and researchers have mentioned this event over the last 250 years, referring to a sudden return of mental clarity or awareness in dying patients, often shortly before death. More specifically, the phenomenon has been reported in people with conditions such as dementia, Alzheimer’s disease, and even brain tumors or strokes.
For people with cognitive decline, moments of terminal lucidity can be surprising and deeply meaningful for both the individual and their loved ones, as they provide a sense of connection and closure. During these periods, the person may suddenly become more alert, communicative, and responsive. They may recognize family members, engage in conversations, or express thoughts and emotions that seem clear and coherent (via Healthline). Per the review, while the exact cause of terminal lucidity is not understood, some researchers believe it may be linked to changes in brain processes as the body approaches death. It’s thought that as the brain begins to shut down, some abilities may function differently compared to a normal brain, resulting in moments of clarity. However, per Healthline, it’s important to note that not all individuals with cognitive decline will experience terminal lucidity, and its occurrence can be unpredictable.