When the Mind Returns
The puzzle of terminal lucidity.
Posted December 29, 2025 | Reviewed by Devon Frye
On her final day, 86-year-old A.M. looked up and began to speak. Her words were clear, her sentences coherent, and for a fleeting moment her daughter glimpsed the woman who had once been—well read, intellectually engaged, a descendant of Switzerland’s industrial elite.
Yet this was the same A.M. who, for the previous two years, had lived with advanced dementia , no longer recognizing her family and unable to feed herself. Just one day earlier, she had not remembered that she even had a daughter.
I learned of A.M.’s case during my early research into sudden, spontaneous—if brief—returns of mental clarity near death, at a time when such cases were still largely scattered across historical reports and clinical anecdotes. When I later spoke with her daughter, she described what happened that day:
“When I entered the room, she looked at me and called out my name. She recognized me. The mother I had missed for so many months was suddenly there again. When I started to cry, she said, ‘No, no. That is not the way. Come here!’ I sat down next to her, and she took my hand. We spoke about my childhood , my daughters, my plans for our new house—even about her illness. After about an hour, she said she was tired. She slowly shook her head, then softly nodded. I nodded too. She closed her eyes. I left the room, and when I closed the door, I broke down in tears—of joy and sadness—standing in the hallway, my hand still on the door handle. I somehow knew this was our last time together. She died later that evening.”
What A.M.’s daughter describes is not an isolated case. It reflects a growing body of reports describing what is now termed terminal lucidity : the sudden and temporary restoration of mental clarity shortly before death in individuals with severe neurological impairment, most often advanced dementia (1).
From Clinical Observation to Scientific Question
Accounts of unexpected clarity near death appear throughout older medical literature. Nineteenth-century physicians, in particular, noted such episodes primarily as diagnostic signs, often preceding rapid decline. One Victorian medical text observed that delirium may briefly cease and the mind become clear, only to be followed by swift physical collapse and death (2).
For much of medical history, these observations remained little more than clinical curiosities. When I began systematically collecting contemporary cases some 15 years ago, the field itself was still small, fragmented, and largely without a shared conceptual framework.
In recent years, however, terminal lucidity has moved from the margins of case reports to the focus of coordinated scientific inquiry. As degenerative brain diseases rise with aging populations, understanding this phenomenon carries important implications—not only for neuroscience , but also for palliative care and for how we accompany people at the end of life.
This shift became visible in 2018, when the National Institute on Aging at the National Institutes of Health convened the first international research workshop devoted specifically to unexpected lucid episodes in dementia, in Bethesda, Maryland (3). At the time, the research community working directly on this phenomenon was still very small. Fewer than a dozen researchers were invited, collectively spanning the core disciplines involved—neurology, psychiatry , psychology, linguistics, nursing science, and palliative care (4).
At that meeting, I presented A.M.’s case alongside several contemporary reports I had documented as part of the first international effort to systematically collect modern accounts of terminal lucidity. Earlier work had relied largely on historical sources, spanning nearly two centuries and varying widely in quality, focus, and diagnostic certainty.
When Clarity Returns Without Cure
If there was a consensus among us at the NIA, it was this: Episodes of terminal lucidity raise more questions than they answer. How could they happen at all? How could someone suddenly regain autobiographical memory , verbal fluency, emotional warmth, and a long-lost capacity to connect with others?
Crucially, A.M.’s lucid episode occurred without any detectable improvement in her neurological condition. There is no documented case in medical history in which such tissue degeneration has been undone. Achieving that would be akin to uncooking a boiled egg. So how is terminal lucidity possible at all?
And might it hold therapeutic promise? While this question remains speculative, its implications would be enormous. Tens of millions of patients and caregivers worldwide could be affected. Reflecting this potential, the NIA subsequently issued a million-dollar funding initiative dedicated to research in this area (5).
What Caregivers Witness
Yet the significance of terminal lucidity extends beyond biology and medicine. It touches something more fundamental: how we relate to and understand the state of those at the end of life, especially when dementia has stripped away recognizable outer behaviors suggesting recognition, understanding, and shared history.
This is reflected clearly in the responses of caregivers—both family members and professionals—who are often profoundly affected by these episodes. Across my research, a recurring theme emerges: Terminal lucidity confronts witnesses not only with medical puzzles, but with existential questions about consciousness, identity , and personhood (6).
Psychologist Jesse Bering captured this sentiment in a 2014 Scientific American column reflecting on his mother’s final moments:
“I really don’t know how my mother managed those five minutes of perfect communion with me when, ostensibly, all of her cognitive functions were already lost. Was it her immortal soul? One last firestorm in her dying brain? Honestly, I’m just glad it happened.” (7)
Another relative—one of nearly 300 caregivers who shared their experiences as part of our research—described witnessing terminal lucidity as “one of the most beautiful and moving things I have ever seen,” before adding, “But I wonder what it means, and I find very little to lean on when looking for answers.”
He is far from alone.
Prevalence, Limits, and What Lies Ahead
At present, our knowledge remains limited. Terminal lucidity is uncommon, though not exceedingly rare. A 2009 New Zealand study of one hundred consecutive deaths suggested that approximately six percent of patients exhibited a lucid episode (8). A British hospice study found that seven out of ten caregivers reported having observed unexpected mental clarity in dying patients at least once in their professional experience (9).
To date, my research group has collected roughly 400 case histories from nearly every region of the world. As of this writing, more than a dozen studies on terminal lucidity are underway internationally. These investigations aim not only to estimate prevalence but also to classify different forms of lucid episodes, examine caregivers’ responses, and explore the phenomenon’s clinical, ethical, and psychological implications.
The time may have come, finally, to move terminal lucidity from the footnotes of medical history into the foreground of scientific inquiry. Whatever future research reveals, this phenomenon is already reshaping how we think about dementia—and, more fundamentally, how we think about consciousness, dying, and what remains of the person even when it seems that all has been lost.
Facebook /LinkedIn image: Ground Picture/Shutterstock
(1) Batthyány, A. & Greyson, B. (2020). Spontaneous Remission of Dementia before Death Results from a Study on Paradoxical Lucidity. Psychology of Consciousness: Theory, Research, and Practice. 1:2020
(2) William Munk: Euthanasia: or Medical Treatment in Aid of an Easy Death . Longmans, Green and Co., London 1887
(3) Eldadah, B. A., Fazio, E. M., & McLinden, K. A. (2019). Lucidity in Dementia: A Perspective from the NIA. Alzheimer’s & Dementia , 15(8), 1104-1106.
(4) Mashour, G.A., Frank, L., Batthyány, A., et al. (2019). Paradoxical Lucidity: A Potential Paradigm Shift for the Neurobiology and Treatment of Severe Dementias. Alzheimer’s and Dementia , 15, 1107-1114.
(5) Eldadah, B. A., Fazio, E. M., & McLinden, K. A. (2019). Lucidity in Dementia: A Perspective from the NIA. Alzheimer’s & Dementia , 15(8), 1104-1106.
(6) Batthyány, A. (2023). Threshold: Terminal lucidity and the border of life and death . St. Martin's Essentials.
(7) Bering, J. (2014). One Last Goodbye: The Strange Case of Terminal Lucidity. Scientific American .
(8) Macleod, A. D. (2009). Lightening Up before Death. Palliative & Supportive Care , 7(4), 516.
(9) Fenwick, P. & Brayne, S. (2011). End-of-Life Experiences: Reaching Out for Compassion, Communication, and Connection—Meaning of Deathbed Visions and Coincidences. American Journal of Hospice and Palliative Medicine , 28, 7-15; Fenwick, P., Lovelace, H. & Brayne, S. (2010). Comfort for the Dying: Five-Year Retrospective and One-Year Prospective Studies of End of Life Experiences. Archives of Gerontology and Geriatrics , 51, 173-179; Brayne, S., Lovelace, H., & Fenwick, P. (2008). End-of-life Experiences and the Dying Process in a Gloucestershire Nursing Home as Reported by Nurses and Care Assistants. American Journal of Hospice and Palliative Medicine , 25(3), 195-206.
Share this post Facebook Bluesky Linkedin Email
There was a problem adding your email address. Please try again.
This article is part of the Bringwise Psychology Journal — daily insights on human behavior, mental health, and personal growth.