Consciousness without a self: EEG and intranasal 5-MeO-DMT | Tommaso Barba, ALPS Conference 2026
Title history
- Consciousness without a self: EEG and intranasal 5-MeO-DMT | Tommaso Barba, ALPS Conference 2026 — observed on 20261105-1252 UTC (YouTube)
Keywords
Summary
124 words
Critical Evaluation
Value of the Information & Strength of the Argument
The value of this presentation lies in its rigorous methodology—a placebo-controlled, single-blind design with 35 participants, real-time subjective ratings, and high-density EEG. The combination of subjective and objective data provides a comprehensive picture of the 5-MeO-DMT state. The argumentation is solid: the speaker clearly distinguishes between self-dissolution and loss of consciousness, illustrates the temporal dynamics, and supports the interpretation with source-localized brain data. The correlations between brain markers and phenomenological ratings, especially Lempel-Ziv complexity, strengthen the case for a mechanistic link between increased entropy and ego dissolution. The comparison with meditation as a ‘saturation’ vs. ‘subtraction’ pathway is thought-provoking and frames the findings within existing theories like the entropic brain hypothesis.
Scientific Rigor, Source Quality, Title Accuracy
The talk demonstrates strong scientific rigor: the study is well-controlled, uses validated scales (Ego Dissolution Inventory), and transparently discusses limitations such as potential muscle artifacts in gamma activity and the influence of participant expectancy. Sources are not explicitly cited within the talk, but the speaker references prior work by his group and others (e.g., Timmermann, Carhart-Harris), and the description provides links to the ALPS organization and conference, which are credible. The title accurately describes the content, focusing on the neural and experiential aspects of selfless consciousness. There is no discrepancy between title and content.
220 words
Title / Content Match
The title accurately reflects the content: the talk focuses on the neural correlates of self-dissolution induced by 5-MeO-DMT.
Quality & Reliability
8/10
The talk presents a well-designed placebo-controlled study from a credible PhD candidate at Imperial College London, but it is a conference presentation not yet peer-reviewed.
Chapters
Cited Sources
- ALPS Foundation — Organization hosting the conference and related resources
- ALPS Conference — Program and speaker information for the 2026 conference
- ALPS LinkedIn — Company page for the ALPS organization
Contribution & Novelties
This study provides novel data on the neural correlates of 5-MeO-DMT-induced ego dissolution, particularly using intranasal administration, which produces a slower, more extended effect compared to smoked or injected forms. The finding that delta oscillations increase while alpha, theta, and beta collapse, alongside a rise in Lempel-Ziv complexity that parallels self-dissolution, offers new insight into how the brain may support a conscious, content-free state. The direct comparison with meditation as a different route to selflessness opens avenues for future comparative research.
Pour aller plus loin :
- Lempel-Ziv complexity — A measure of signal unpredictability used to quantify psychedelic brain states.
- 5-MeO-DMT — The compound studied, known for its rapid onset and profound ego-dissolving effects.
- Posterior cingulate cortex — A key hub of the default mode network, implicated in self-referential processing and altered in ego dissolution.
- Entropic brain theory (Carhart-Harris) — Proposed that psychedelics increase brain entropy, leading to altered consciousness.
150 words
Radar Profile
The radar profile shows high scores across all dimensions, indicating a well-rounded presentation with strong technical detail and reliable sourcing.