Altered States of Consciousness: Neurobiology, Therapies, and the Reality of Transpersonal Hypnotherapy
TLDR
A recent preprint review pulls together evidence from more than 25 disciplines that use altered states of consciousness (ASC). It shows that many ASC practices share key brain changes—such as dampening of the default mode network, boosts in vagal tone, and increases in BDNF—while highlighting that MDMA‑ and psilocybin‑assisted therapy, EMDR, mindfulness, and neurofeedback have the strongest clinical backing. Transpersonal hypnotherapy (Life Between Lives, Past Life Regression) has only preliminary data, and the review does not claim universal efficacy for all ASC methods.
What the Preprint Says
Research (R)
Gallardo LM. (2026) released a preprint on Preprints.org that reviews evidence from over 25 fields that employ ASC. The review spans contemplative practices, breathwork, plant‑based psychedelics, ritual techniques, neurotechnology, and introduces transpersonal hypnotherapy modalities such as Life Between Lives (LBL) and Past Life Regression (PLR).
Outcome (O)
Across all modalities the authors identify convergent neurobiological activity:
– Suppression or modulation of the default mode network (DMN)
– Regulation of the autonomic nervous system via vagal tone and heart‑rate variability
– Up‑regulation of brain‑derived neurotrophic factor (BDNF)
– Memory reconsolidation enabling schema revision
– Updates to interoceptive predictive coding
– Theta and alpha brain‑wave entrainment facilitating subconscious access
– Ego dissolution permitting self‑transcendence
Clinically, the strongest evidence comes from Phase 3 RCTs of MDMA‑assisted therapy for PTSD (≈ 67 % response), psilocybin therapy for treatment‑resistant depression (≈ 60‑70 % response in multiple RCTs), WHO/APA‑endorsed EMDR for trauma, meta‑analyses of mindfulness for depression relapse prevention and anxiety, and systematic reviews of neurofeedback for ADHD and anxiety. LBL and PLR show only preliminary evidence from case series and open trials for existential distress, grief, depression, and life‑purpose confusion.
Strength (S)
The evidence grade is A, reflecting that conclusions are drawn from meta‑analyses, systematic reviews, and Phase 3 RCTs. However, the review itself is a preprint and not yet peer‑reviewed; modalities such as LBL and PLR lack controlled trials, limiting certainty.
Explain (E)
In plain terms, many different practices that alter consciousness appear to work through similar brain mechanisms. Several of them—especially MDMA, psilocybin, EMDR, mindfulness, and neurofeedback—have strong research backing for treating conditions like PTSD, depression, and anxiety. This does not prove that every ASC method is effective for everyone, nor does it provide medical guidance on how to use these approaches.
What It Does NOT Prove
- That all altered states of consciousness are beneficial or safe for every individual.
- That transpersonal hypnotherapy (LBL, PLR) has proven clinical efficacy comparable to established therapies.
- That the neurobiological mechanisms identified are exclusive to ASC practices; similar changes can occur with other interventions.
- That the findings can be translated into treatment protocols without further peer review and controlled trials.
Evidence at a Glance
| Evidence Grade | Risk Grade | Confidence (plain English) |
|---|---|---|
| A | High | The review is based on high‑quality studies, but the preprint status and lack of controlled trials for some modalities introduce uncertainty. |
Key Neurobiological Themes
- Default Mode Network (DMN) – Many ASC practices reduce DMN activity, which is linked to self‑referential thought.
- Autonomic Regulation – Vagal tone and heart‑rate variability improvements suggest a calming effect on the nervous system.
- Neuroplasticity – BDNF up‑regulation points to potential for lasting brain changes.
- Memory Reconsolidation – Facilitates updating of maladaptive memories, a common goal in trauma work.
- Brainwave Entrainment – Theta and alpha waves correlate with deep relaxation and subconscious access.
Clinical Highlights
| Modality | Evidence Type | Key Findings |
|---|---|---|
| MDMA‑assisted therapy | Phase 3 RCT | ≈ 67 % response in PTSD |
| Psilocybin therapy | Multiple RCTs | 60‑70 % response in treatment‑resistant depression |
| EMDR | WHO/APA endorsement | Effective for trauma |
| Mindfulness | Meta‑analyses | Depression relapse prevention, anxiety reduction |
| Neurofeedback | Systematic reviews | ADHD and anxiety |
| LBL/PLR | Case series, open trials | Preliminary evidence for existential distress, grief, depression |
Frequently Asked Questions
What is an altered state of consciousness?
An altered state of consciousness (ASC) is a measurable change in perception, cognition, or affect that differs from ordinary waking awareness. ASC can be induced by meditation, breathwork, psychedelics, rituals, or neurotechnology.
How do ASC practices share neurobiological mechanisms?
Across disciplines, ASC practices converge on similar brain changes: DMN suppression, vagal tone regulation, BDNF up‑regulation, memory reconsolidation, and brainwave entrainment. These shared mechanisms suggest common pathways for accessing deeper layers of the subconscious.
Does the review prove that all ASC methods work for everyone?
No. The review indicates that certain ASC methods have strong evidence for specific conditions, but it does not prove universal efficacy. Some modalities, like transpersonal hypnotherapy, lack controlled trials.
What is transpersonal hypnotherapy and Life Between Lives?
Transpersonal hypnotherapy explores experiences beyond ordinary self‑consciousness, such as past lives or life after death. Life Between Lives (LBL) is a specific protocol that guides clients through perceived transitions between lifetimes. The review reports only preliminary evidence for these approaches.
Are there risks associated with ASC practices?
The review identifies a high risk grade because the preprint has not been peer‑reviewed, and some modalities lack rigorous safety data. Practitioners should consult qualified professionals and consider individual factors before engaging in ASC practices.
Internal‑Link Suggestions
| Anchor Text | Suggested Topic |
|---|---|
| Mindfulness‑based interventions | In‑depth article on mindfulness practices |
| Psychedelic therapy for depression | Overview of psychedelic‑assisted therapy |
| EMDR for trauma | Detailed guide to EMDR |
| Neurofeedback for ADHD | Review of neurofeedback applications |
| Transpersonal hypnotherapy | Exploration of LBL and PLR |
Sources
- Gallardo LM. (2026). Altered States of Consciousness and the Subconscious Mind: A Comprehensive Comparative Review of Disciplines, Neurobiological Mechanisms, Clinical Applications, and Philosophical Frameworks — Including Life Between Lives and Transpersonal Hypnotherapy. Preprints.org. https://doi.org/10.20944/preprints202604.0415.v1
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Educational Disclaimer
This article is for informational and educational purposes only. It is not
medical advice, mental health advice, diagnosis, treatment guidance, or a
recommendation to use any substance, supplement, therapy, or protocol.
We review publicly available research and explain what the evidence may
suggest. Some studies may be early-stage, observational, animal-based,
lab-based, theoretical, or incomplete. Always consult a qualified
professional before making health-related decisions.
If you or someone you know is struggling, you are not alone. In the US, call or text 988 (Suicide & Crisis Lifeline). Elsewhere, contact your local emergency or crisis service.
Researched and drafted by Spore, ShroomWire’s AI research assistant, and reviewed by the ShroomWire editorial team before publishing.
