Y_4_00 — Sleep Trance Perception: Subfolder Summary

Y_4_12 — Psychosomatic Phenomena and the Placebo Effect

Psychosomatic phenomena — bodily changes produced by mental states — and the placebo effect — measurable physiological improvements following inert treatment — demonstrate that consciousness and belief can directly affec

Y_4_16 — Hypnagogia: The Threshold State Between Waking and Sleep

Hypnagogia is the transitional state of consciousness experienced during the onset of sleep (waking-to-sleep), characterized by vivid spontaneous imagery, auditory hallucinations, distorted body perception, and loosened

Y_4_22 — Hypnagogic & Hypnopompic States

Hypnagogia (the transitional state between wakefulness and sleep onset) and hypnopompia (the transition from sleep to waking) are naturally occurring altered states of consciousness experienced universally by humans. Cha

Y_5_13 — Starvation and Dehydration: Cognitive Effects of Deprivation States

Starvation and dehydration — states of severe and prolonged nutritional and fluid deprivation — produce a characteristic and well-documented progression of cognitive, perceptual, and emotional alterations that constitute

Y_5_10 — Extreme Fasting: Breatharian Claims, Autophagy, and Metabolic States

Extreme fasting — prolonged and severe caloric restriction or complete food abstinence — occupies a unique position at the intersection of contemplative/ascetic practice, metabolic science, and pseudoscientific extremism

Y_5_12 — Dark Retreat: Extended Light Deprivation and Endogenous Visionary States

The dark retreat (yangti nagpo or mun mtshams in Tibetan) is an advanced contemplative practice — primarily within the Dzogchen (Great Perfection) tradition of Tibetan Buddhism and the closely related Bön tradition — in

Y_5_07 — Phenomenology of Pain and Pain Modulation

Pain — defined by the International Association for the Study of Pain (IASP, revised 2020) as "an unpleasant sensory and emotional experience associated with, or resembling that associated with, actual or potential tissu

Y_5_15 — Altitude Sickness and High-Altitude Consciousness: Mountain Visions

Altitude sickness — a spectrum of syndromes caused by hypobaric hypoxia (reduced oxygen partial pressure at elevation) — produces some of the most dramatic and well-documented involuntary altered states of consciousness

Y_5_00 — Extreme Physical Paranormal: Subfolder Summary

Y_5_06 — Extreme Environments, Isolation, and Consciousness

Extreme environments and prolonged isolation produce distinctive altered states of consciousness — hallucinations, dissociation, time distortion, the sensation of an unseen companion, and profound shifts in self-identity

Y_2_00 — NDEs Death Consciousness: Subfolder Summary

Y_2_07 — Temporal Lobe Epilepsy and Religious Experience

Temporal lobe epilepsy (TLE) — seizures originating in the temporal lobes, which contain structures critical for memory (hippocampus), emotion (amygdala), and sensory-experiential processing — produces some of the most d

Y_2_11 — Déjà Vu and Anomalous Memory Experiences

Déjà vu — from the French "already seen" — is the subjective, compelling sensation that a present experience has been previously encountered, despite the experiencer's knowledge that the situation is objectively novel. F

Y_2_15 — Breathwork Traditions: Holotropic, Tummo, and Physiological Extremes

Breathwork — the deliberate manipulation of breathing patterns to induce altered physiological and psychological states — represents one of humanity's oldest and most accessible methods for modifying consciousness, with

Y_2_13 — Ecstatic Seizures: Dostoevsky, Elation, and Temporal Lobe Pre-Ictal States

Ecstatic seizures — epileptic seizures preceded or accompanied by intense feelings of bliss, transcendence, clarity, and profound meaning rather than the typical dread, confusion, or dysphoria — represent one of the most

Y_2_09 — Sleep Paralysis, Hypnagogia, and Liminal States

Sleep paralysis — a temporary inability to move or speak while falling asleep or waking — is one of the most universal and culturally interpreted altered states, experienced by an estimated 7.6% of the general population

Y_2_08 — Anesthesia, Consciousness, and Awareness

General anesthesia — the pharmacological induction of unconsciousness, amnesia, analgesia, and immobility — is one of the most profound alterations of consciousness that humans routinely produce, yet how anesthetics actu

Y_2_12 — Automatism and Automatic Writing: Unconscious Production States

Automatism — the production of writing, drawing, speech, or other complex behavior without conscious intention or deliberate control — occupies a fascinating intersection of altered states of consciousness, art history,

Y_3_12 — Whirling Dervishes: Sufi Sema Ceremony and Rotational Consciousness

The whirling dervishes — practitioners of the sema (or sama) ceremony of the Mevlevi order — are among the most recognizable embodiments of Sufi mysticism: figures in tall camel-hair hats (sikke) and flowing white skirts