Learning as the unifying mechanism of psychedelic action
Alice Caulfield, Allan H. Young, Mitul A. Mehta
Journal of Psychopharmacology December 26, 2025 DOI: 10.1177/02698811251405683 (opens in new tab)
Study at a glance
AI-extracted from the abstract| Characteristics | Narrative review Peer reviewed |
|---|---|
| Topics | Neuroplasticity |
| Keywords | Mechanism biology Relevance law Action physics Matching statistics Perspective graphical Affect linguistics Cognitive psychology Cognitive science Social learning Psychotherapist |
| Citations | 2 |
| Key findings | Psychedelics may alter learning mechanisms through systems-level changes in top-down and bottom-up information processing and reopening of critical learning periods, explaining context-dependent outcomes. |
Abstract
Psychedelics are gaining attention as putative treatments for a range of psychiatric conditions, and evidence suggests that they produce sustained behavioural and clinical change. Enhanced learning is an emerging candidate mechanism mediating these sustained effects. This narrative review synthesises evidence across behavioural, neural and computational levels to examine the current evidence base for how psychedelics may alter learning mechanisms. We propose that viewing psychedelic mechanisms through the lens of learning unifies context-dependent outcomes, increased environmental sensitivity and neuroplastic change. We discuss how persistent changes in top-down and bottom-up information processing at a systems-level may account for both the therapeutic and adverse effects of psychedelics, and highlight a mechanistic convergence between such systems-level changes and the recently identified psychedelic-mediated reopening of critical learning periods. This systems-level framework may explain why psychedelic outcomes vary widely and hinge critically on the context: it is the learning environment, including psychological support and therapeutic insights, which shapes the lasting effect. If the post-psychedelic period is characterised by a vulnerable neuroplastic state in combination with increased environmental sensitivity, usually observed uniquely during childhood, this would offer a window of opportunity for revision of entrenched beliefs. Understanding these mechanisms has important translational relevance for the design and implementation of psychedelic-assisted psychotherapy.
Comparable studies
Other narrative reviews on neuroplasticity, most cited first.
| Study | Year | Design | Participants |
|---|---|---|---|
| A neurotrophic hypothesis of depression: role of synaptogenesis in the actions of NMDA receptor antagonists | 2012 | Review | |
| Towards an understanding of psychedelic-induced neuroplasticity. Review of preclinical and clinical studies | 2023 | Review | |
| Buddha's Brain: Neuroplasticity and Meditation [In the Spotlight] | 2008 | Review | |
| Neuroplasticity as a convergent mechanism of ketamine and classical psychedelics | 2021 | Review | |
| Psychedelics in Psychiatry: Neuroplastic, Immunomodulatory, and Neurotransmitter Mechanisms | 2020 | Review |
Citations in the library
Cited by 3
- Systems-based psychiatry: insights from psychedelic research on mechanisms of healing Frontiers in Psychiatry July 13, 2026
- Psilocybin selectively rescues cognitive flexibility impairments caused by aberrant prefrontal error signaling bioRxiv July 9, 2026
- Where is the sweet spot for psychedelic-enhanced fear extinction? An integrative quantitative synthesis of dose-effect patterns in rodent models. Journal of Psychopharmacology August 3, 2026
Cites 51
- 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
- Psychedelics Promote Structural and Functional Neural Plasticity Cell Reports June 1, 2018
- Psychedelics promote plasticity by directly binding to BDNF receptor TrkB Nature Neuroscience June 1, 2023
- Emotions and brain function are altered up to one month after a single high dose of psilocybin. Scientific Reports February 10, 2020
and 46 more in the library