Y_4_00 — Sleep Trance Perception: Subfolder Summary

Y_4_17 — Sleep Disorders & Parasomnias

Sleep disorders affect an estimated 50–70 million Americans and up to 45% of the global population, encompassing over 80 distinct conditions classified by the International Classification of Sleep Disorders (ICSD-3, 2014

Y_4_14 — Virtual Reality, Immersive Technology, and Altered Perception

Virtual reality (VR) and immersive technologies create genuine altered states of perception — not merely visual illusions but deep modifications of body ownership, spatial awareness, self-identity, and emotional processi

Y_5_16 — Breathwork Traditions: Pranayama, Holotropic, Tummo & Physiological Mechanisms

Deliberate manipulation of breathing patterns — breathwork — represents one of humanity's oldest and most cross-culturally widespread technologies for inducing altered states of consciousness, modulating autonomic functi

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_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_14 — Dying Process Phenomenology: Shared Death Experiences and After-Death Communication

The phenomenology of death and the experiences reported by those who witness the dying process include several distinct categories of altered-state phenomena that extend beyond the well-known near-death experience (NDE).

Y_2_00 — NDEs Death Consciousness: Subfolder Summary

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_10 — Drowning and Near-Drowning: Aquatic Altered Consciousness

Drowning — defined by the WHO (2002, revised 2005) as "the process of experiencing respiratory impairment from submersion/immersion in liquid" — is one of the leading causes of accidental death worldwide (~236,000 deaths

Y_3_10 — Fasting, Asceticism, and Altered Consciousness

Fasting and ascetic practices — deliberate deprivation of food, sleep, comfort, or sensory input — have been used across virtually all religious and spiritual traditions to induce altered states of consciousness, visions

Y_1_13 — Xenon Gas and Nitrous Oxide: Anesthetic Gases as Consciousness Probes

Nitrous oxide (N₂O — "laughing gas") and xenon (Xe — a noble gas) are two anesthetic gases that have served as remarkable probes of consciousness — revealing how the manipulation of a single molecule or atom can dissolve

Y_1_11 — Ketamine: Dissociative Anesthetic and Consciousness Explorer

Ketamine is a dissociative anesthetic — first synthesized by Calvin Stevens in 1962 and introduced into clinical use by Edward Domino and Guenter Corssen (1966) — that has undergone a remarkable transformation from battl

Y_1_21 — Plant Medicine & Alkaloid Chemistry

Alkaloids — nitrogen-containing organic compounds produced by plants as secondary metabolites — constitute one of the most important classes of biologically active molecules in both medicine and human culture. Over 20,00

Y_1_14 — Toad Venom: Bufo alvarius, 5-MeO-DMT, and Desert Sacrament

Toad venom — specifically the venom of the Sonoran Desert toad (Incilius alvarius, formerly Bufo alvarius) — contains 5-methoxy-N,N-dimethyltryptamine (5-MeO-DMT), one of the most potent psychoactive tryptamines known, p

Y_1_18 — Addiction Neurochemistry: Reward Circuits, Tolerance & Therapeutic Frontiers

Addiction — now formally termed substance use disorder (SUD, DSM-5) — is a chronic, relapsing brain disorder characterized by compulsive drug seeking despite harmful consequences, affecting approximately 35 million peopl

Y_1_15 — Micro-Dosing: Sub-Perceptual Psychedelic Use and Cognitive Effects

Micro-dosing — the practice of regularly consuming sub-perceptual doses (typically 1/10th to 1/20th of a standard recreational dose) of psychedelic substances, most commonly LSD (~10–20 micrograms) or psilocybin (~0.1–0.

Y_1_10 — Ibogaine: African Plant Medicine and Addiction Interruption

Ibogaine is a naturally occurring psychoactive indole alkaloid derived from the root bark of the West African shrub Tabernanthe iboga, which has been used for centuries in the Bwiti spiritual tradition of Gabon, Cameroon

Y_1_00 — Psychedelics Entheogens: Subfolder Summary