Bruce Greyson

6 articles
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Near-Death Experiences and Shamanic Initiation: When Clinical Death Meets Ancient Ceremony

Here is something that should stop you mid-step: a Dutch cardiologist and a Siberian shaman, separated by five thousand miles and five thousand years of cultural context, are describing the same journey. One speaks in the language of peer-reviewed cardiology journals.

13 min · 9 researchers · 20 concepts
UP death consciousness

Cardiac Arrest and Consciousness: Pim van Lommel's Prospective Study

In 2001, the Lancet — one of the most prestigious medical journals in the world — published a study that should have transformed neuroscience. Pim van Lommel, a Dutch cardiologist, and colleagues reported the results of a prospective study of near-death experiences in cardiac arrest survivors:...

15 min · 4 researchers · 6 concepts
UP death consciousness

Near-Death Experiences: What Clinical Data Reveals About Consciousness and Brain Death

The near-death experience (NDE) is one of the most well-documented anomalies in clinical medicine — and one of the most systematically ignored. Approximately 10-20% of people who survive cardiac arrest report detailed, vivid experiences during the period when their brain showed no measurable...

17 min · 4 researchers · 14 concepts
UP death consciousness

Terminal Lucidity: The Impossible Awakening Before Death

Consider this clinical scenario: a patient with severe Alzheimer's disease has not recognized family members in years. Their brain has lost approximately 30% of its cortical volume.

14 min · 1 researchers · 11 concepts
UP entheogen history

Iboga and the Bwiti Tradition: The Root That Breaks Addiction and Opens the Door to the Ancestors

In the equatorial rainforests of Central Africa — Gabon, Cameroon, and the Republic of Congo — a small understory shrub with yellow flowers and orange fruit grows in the shade of the forest canopy. Tabernanthe iboga is not impressive to look at.

13 min · 1 researchers · 12 concepts
UP grief death

Spiritual Perspectives on Death

Every wisdom tradition humanity has produced has placed the question of death at its center. Not as a problem to be solved but as a mystery to be encountered — the threshold experience that defines the boundary of ordinary consciousness and, according to virtually every spiritual tradition,...

16 min · 5 researchers · 26 concepts