There have been innumerable anecdotes of unexpected or paradoxical mental lucidity in the days and weeks before death among people with longstanding dementia. ~ American neurobiologist George Mashour
Terminal lucidity occurs when those with a severe chronic brain disease experience a revival of mental clarity before dying. This phenomenon has repeatedly been reported since antiquity.
The most remarkable cases involve patients whose brains were destroyed by diseases such as tumors and Alzheimer’s, but who seemed to recover shortly before death with their memory intact. ~ German American neurobiologist Michael Nahm