Near-death experience

A vivid experience reported during a close encounter with death or critical illness, often involving altered awareness, intense emotion, or unusual perceptions.

Pam Reynolds case: A widely discussed near-death experience reported by Pam Reynolds during a 1991 surgical operation. This unusually documented case became central to debates about awareness during cardiac arrest.
REM intrusion: The occurrence of rapid-eye-movement sleep features during wakefulness or transitions between sleep and waking. REM-like processes may help explain vivid imagery and paralysis reported in some episodes.
Raymond Moody: An American psychiatrist whose 1975 book helped popularize the study of near-death experiences. His interviews and published account brought a recurring sequence of motifs to public attention.
Delirium: An acute disturbance in attention and awareness that develops over a short period and often fluctuates. Critical illness can cause delirium, which may overlap with or differ from near-death reports.
AWARE study: A multicenter study led by Sam Parnia investigating awareness and brain activity during cardiac arrest. Its attempted verification of resuscitation-period perceptions brought systematic testing to these reports.
Temporal lobe: A brain region involved in memory, emotion, language, and the processing of sensory information. Temporal-lobe activity has been proposed as one source of unusual perceptions and autobiographical experiences.
Life After Life: Raymond Moody’s 1975 book describing recurring features in accounts of people revived after close brushes with death. The book helped establish the modern popular framework for interpreting these reports.
Dream: A sequence of experiences generated during sleep, often involving imagery, emotion, and narrative. Dreams can resemble near-death accounts but arise in a different state of consciousness.
Life review: A reported experience in which events from one’s life seem to be recalled or witnessed rapidly. Rapid autobiographical recall is a recurring motif in near-death accounts.
Hypoxia: A condition in which tissues receive insufficient oxygen. Oxygen deprivation during critical illness can alter perception and brain function.

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