When individuals approach death, they may undergo significant physiological changes. These changes can result in decreased vital functions, such as a slowing heart rate, reducing oxygen flow to the brain.
Moreover, individuals may experience lowered body temperature and irregular breathing patterns. It’s not only the body’s extremities and organs that undergo alterations but also the brain itself.
A study conducted by the University of Michigan revealed that the brains of dying individuals exhibit a notable increase in activity. In examining four patients withdrawn from life support, researchers noted a surge of activity in two patients just before their passing.
The observed brain activity resembled patterns seen during conscious thought, characterized by gamma waves. One patient in the study displayed a three-hundredfold increase in these waves, suggesting a surge in brain activity before death.
Professor Jimo Borjigin from the University of Michigan proposed the existence of a ‘cover consciousness’ that emerges just before death.
She suggested that individuals near death may recall sensory experiences or perceive themselves as having out-of-body sensations or flying. Borjigin emphasized the potential discovery of fundamental neurological indicators of covert consciousness.
In a separate study involving rats, Borjigin recorded a surge in serotonin levels in the brain moments before death. This neurotransmitter, associated with psychiatric disorders, might contribute to hallucinations but remains unclear whether rats and humans share similar experiences regarding brain chemicals.
Referencing a previous PNAS study, Borjigin found that dying rats displayed a surge in gamma waves similar to those experiencing heart attacks. The study indicated that the mammalian brain can produce heightened conscious activity near death.
Research in the Journal of the Missouri State Medical Association explores brain consciousness and its impact on near-death phenomena. However, researchers acknowledge significant gaps in understanding the brain’s connection to consciousness and its influence on near-death encounters.