New research shows surprising activity levels in dying brains and may help explain the sudden clarity many people with dementia experience near death
Long the fixation of religions, philosophy and literature the world over, the conscious experience of dying has recently received increasingly significant attention from science. This comes as medical advances extend the ability to keep the body alive, steadily prying open a window into the ultimate locked room: the last living moments of a human mind.
What is terminal lucidity? For decades, researchers, hospice caregivers and stunned family members have watched with awe as people with Alzheimer’s or other forms of dementia suddenly regain their memories and personalities just before death. To their family members it might seem like a second lease on life, but for many experienced medical workers, it can be a sign the end is near.
The potential implications of these widespread, temporary cognitive resurgences are profound. “It suggests there may be neural networks that are remaining, and/or pathways and neural function, that could help potentially restore cognitive abilities to individuals we otherwise think are permanently impaired,” Peterson says.
Jimo Borjigin, a neurologist and an associate professor of molecular and integrative physiology at the University of Michigan, was involved in all three studies. The surge of gamma waves in dying subjects was particularly intense in a brain region Borjigin refers to as the “posterior cortical ‘hot zone,’” located near the back of the skull. Some other researchers believe this region may also be essential to conscious experience.
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