An increase in a certain kind of high-frequency wave in dying brains might be associated with last-minute conscious experiences, but scientists don't know for sure.
In their last minutes of life, some people's brains generate a surge of surprisingly organized-looking electrical activity that may reflect consciousness — although scientists aren't entirely sure.
"If you talk about the dying process, there is very little we know," said Jimo Borjigin , a neuroscientist at the University of Michigan Medical School who led the study. It's rare for patients to have their brains continuously monitored as they die, Borjigin told Live Science."This is maybe the first study to really show second-by-second how the brain dies.
Because the people who survive to report a near-death experience are inherently different from the people who die — their brains don't permanently lose function, for one thing — it's hard to determine whether those who actually die also have these subjective experiences. 'Reading' the dying brain In their new paper, Borjigin and her team made a deliberate effort to use EEG to capture what the brain looks like during death.
The temporoparietal junction, a brain region where the temporal and parietal lobes meet, toward the back of the brain behind the ear, was particularly active with gamma waves. This region is known to be activated when people have out-of-body experiences or dreams, Borjigin said. "We know when you die a cardiac death as opposed to a brain death, that takes time," he said. Minutes pass between the heart stopping and brain cells dying, he said."It shouldn't be a big surprise during those minutes, you will see aberrant electrophysiological activity in the brain."
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