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anoxia

Cerebral anoxia is the lack of oxygen to the brain. If severe, it can cause irreversible brain damage. Less severe cases can cause sensory distortions and hallucinations. Cerebral anoxia has been cited by some researchers as the cause of near-death experiences (NDEs).

further reading

Blackmore, Susan J., Dying to Live: Near-death Experiences, (Buffalo, N.Y. : Prometheus Books, 1993).

Lutz, Peter and Goran E. Nilsson. The Brain Without Oxygen (Chapman & Hall, 1998)

anomaly

anthropometry