7 Scientific Findings on Ayahuasca and Brain Function

Ayahuasca has traditionally been used in ceremonial contexts in the Amazon basin. In recent decades, however, it has also become the subject of neuroscientific investigation. Researchers have examined how its active compounds — including DMT and beta-carbolines — influence brain activity, connectivity patterns, and cognitive processing.

Below is a research-based overview of seven key findings related to ayahuasca and brain function.

1. Reduced Activity in the Default Mode Network (DMN)

Functional neuroimaging studies have demonstrated decreased activity in core hubs of the Default Mode Network following ayahuasca administration.

Source:
Palhano-Fontes et al., 2015 – Frontiers in Human Neuroscience

https://www.frontiersin.org/articles/10.3389/fnhum.2015.00350/full

The DMN is associated with self-referential thinking, autobiographical memory, and rumination. Excessive DMN activity has been observed in depressive and anxiety disorders. Temporary modulation of this network is considered one possible mechanism underlying altered states of consciousness.

2. Increased Global Functional Connectivity

Research in psychedelic neuroscience suggests that substances acting on serotonin 5-HT2A receptors may increase global functional connectivity between brain regions that do not typically communicate extensively.

Related Study:
Carhart-Harris et al., 2014 – Human Brain Mapping

https://pubmed.ncbi.nlm.nih.gov/25044765/

Although this study examined psilocybin, similar receptor mechanisms are relevant for ayahuasca’s DMT component. Increased connectivity may contribute to cognitive flexibility and novel associative processing.

3. Altered Blood Flow in Emotional Processing Regions

Earlier neuroimaging work found that ayahuasca increases blood flow in frontal and paralimbic regions involved in emotional regulation and introspection.

Source:
Riba et al., 2006 – Journal of Psychopharmacology

https://pubmed.ncbi.nlm.nih.gov/16699169/

These findings suggest modulation of circuits linked to mood and emotional awareness.

4. Modulation of the Amygdala Response

Preliminary findings in psychedelic research indicate altered amygdala responsiveness during emotionally salient tasks. The amygdala plays a central role in fear processing and emotional salience detection.

Related Research:
Kraehenmann et al., 2015 – Biological Psychiatry

https://pubmed.ncbi.nlm.nih.gov/25596654/

While conducted with psilocybin, the serotonergic pathway involved is also relevant to ayahuasca research.

5. Evidence of Neuroplasticity Promotion

Preclinical cellular research has shown that psychedelic compounds may promote structural and functional neural plasticity, including dendritic growth and synaptogenesis.

Source:
Ly et al., 2018 – Cell Reports

https://pubmed.ncbi.nlm.nih.gov/30290161/

This research is ongoing, and translation to human outcomes is still under investigation.

6. Acute Changes in Brain Oscillations

Electrophysiological studies have documented changes in brain oscillatory activity during ayahuasca experiences, including altered alpha power patterns.

Source:
Riba et al., 2002 – Journal of Pharmacology and Experimental Therapeutics

https://pubmed.ncbi.nlm.nih.gov/11854445/

Changes in oscillatory dynamics are associated with altered perceptual and cognitive states.

7. Temporary Disruption of Rigid Cognitive Patterns

Combining DMN modulation, altered connectivity, and serotonergic receptor activation may temporarily reduce rigid cognitive processing patterns. This hypothesis is currently explored in psychiatric neuroscience.

Overview:
Reiche et al., 2018 – Journal of Affective Disorders

https://pubmed.ncbi.nlm.nih.gov/30031506/

Important Context

Although neuroscientific findings are expanding, ayahuasca remains under active investigation. Effects vary significantly between individuals and depend on dosage, setting, psychological preparation, and medical status.

Ayahuasca is not approved as a medical treatment for neurological or psychiatric conditions outside controlled research settings.

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Our program emphasizes safety protocols, informed consent, and post-retreat integration guidance.

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Participation is subject to individual screening and is not a substitute for medical or psychiatric care.