Disintegration of Default Mode: Functional MRI Insights Into N,N-Dimethyltryptamine (DMT), Consciousness, and Subcortical Connectivity.
Amy Avakian
Cureus July 1, 2025 DOI: 10.7759/cureus.88931 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Review Peer reviewed |
|---|---|
| Interventions | N N-Dimethyltryptamine (DMT) |
| Topics | DMT 5-MeO-DMT |
| Keywords | FMRI Neuroimaging Functional MRI FMRI Pituitary DMT Dmn |
| Key findings | DMT induces a hyperconnected brain state with disrupted default mode network and heightened subcortical activity, suggesting consciousness is a flexible process rather than a fixed entity. |
Abstract
N,N-Dimethyltryptamine (DMT), a potent endogenous psychedelic, evokes rapid and immersive shifts in consciousness that challenge conventional neurocognitive models. Functional magnetic resonance imaging (fMRI) and electroencephalography (EEG)-fMRI studies suggest that these altered states are not chaotic but patterned, marked by a disruption of the default mode network (DMN), an increase in global integration, and heightened subcortical activity. Under the influence of DMT, the brain becomes less modular and more fluid, reorganizing itself into a hyperconnected state. Activity increases in the thalamus, amygdala, and hippocampus, regions involved in memory, emotion, and sensory salience. Meanwhile, the cortical regions typically responsible for self-referential processing lose their organizing control. This temporary collapse of hierarchical brain structure is associated with vivid imagery, emotional release, and a loosening of the boundaries that define the self. Rather than simply distorting perception, DMT appears to reveal the brain's capacity to restructure consciousness itself. These findings suggest that consciousness may not be a fixed entity housed within a singular network but a flexible process shaped by context, neurochemistry, and meaning.
Comparable studies
Other narrative reviews on 5-MeO-DMT, most cited first.
| Study | Year | Design | Participants |
|---|---|---|---|
| Neuropharmacology of N,N-dimethyltryptamine | 2016 | Review | |
| N, N-Dimethyltryptamine (DMT), an Endogenous Hallucinogen: Past, Present, and Future Research to Determine Its Role and Function Humans and animals (general) | 2018 | Review | |
| Psychedelic 5-methoxy-N,N-dimethyltryptamine: metabolism, pharmacokinetics, drug interactions, and pharmacological actions. Humans (pharmacokinetics) | 2010 | Review | |
| Dark Classics in Chemical Neuroscience:N,N-Dimethyltryptamine (DMT) | 2018 | Review | |
| A possibly sigma-1 receptor mediated role of dimethyltryptamine in tissue protection, regeneration, and immunity. | 2013 | Review |
Citations in the library
Cites 7
- Neural correlates of the psychedelic state as determined by fMRI studies with psilocybin Proceedings of the National Academy of Sciences January 23, 2012
- REBUS and the Anarchic Brain: Toward a Unified Model of the Brain Action of Psychedelics Pharmacological Reviews June 20, 2019
- Neural correlates of the DMT experience assessed with multivariate EEG. Scientific Reports November 19, 2019
- Default Mode Network Modulation by Psychedelics: A Systematic Review The International Journal of Neuropsychopharmacology October 21, 2022
- Human brain effects of DMT assessed via EEG-fMRI. Proceedings of the National Academy of Sciences March 28, 2023
and 2 more in the library