Cited by 17Psychedelics and Drug StudiesTreatment of Major DepressionPain Management and Placebo Effect

Uncovering psychedelics: from neural circuits to therapeutic applications

Open access
Melani, Alice, Bonaso, Marco, Biso, Letizia, Zucchini, Benedetta, Conversano, Ciro, Scarselli, Marco·2025·Pharmaceuticals

Abstract

Psychedelics, historically celebrated for their cultural and spiritual significance, have emerged as potential breakthrough therapeutic agents due to their profound effects on consciousness, emotional processing, mood, and neural plasticity. This review explores the mechanisms underlying psychedelics' effects, focusing on their ability to modulate brain connectivity and neural circuit activity, including the default mode network (DMN), cortico-striatal thalamo-cortical (CSTC) loops, and the relaxed beliefs under psychedelics (REBUS) model. Advanced neuroimaging techniques reveal psychedelics' capacity to enhance functional connectivity between sensory cerebral areas while reducing the connections between associative brain areas, decreasing the rigidity and rendering the brain more plastic and susceptible to external changings, offering insights into their therapeutic outcome. The most relevant clinical trials of 3,4-methylenedioxymethamphetamine (MDMA), psilocybin, and lysergic acid diethylamide (LSD) demonstrate significant efficacy in treating treatment-resistant psychiatric conditions such as post-traumatic stress disorder (PTSD), depression, and anxiety, with favorable safety profiles. Despite these advancements, critical gaps remain in linking psychedelics' molecular actions to their clinical efficacy. This review highlights the need for further research to integrate mechanistic insights and optimize psychedelics as tools for both therapy and understanding human cognition.

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  • MDMA increases cortical-limbic communication, integrating previously segregated brain networks while reducing rigid connectivity in associative areas.

    “Neuroimaging studies demonstrate that MDMA increases cortical-limbic communication, integrating previously segregated brain networks while reducing rigid connectivity in associative areas - a pattern linked to greater cognitive flexibility and emotional openness (91).”

    From Psychoanalytically informed MDMA-assisted therapy for pathological narcissism: a novel theoretical approach (2025) · cites this paper as [91]

    Section 3 describes neuroimaging findings of greater integration between previously separate networks and reduced connectivity within associative networks, particularly in discussions of LSD and psilocybin. It does not establish that MDMA produces this pattern or specifically increases cortical–limbic communication. Section 2 discusses MDMA’s molecular, prosocial, and plasticity effects instead. (LLM, conf=0.85)

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  1. [68]MindMed Announces Positive Topline Results from Phase 2b Trial of MM-120 in Generalized Anxiety Disorder: Mind Medicine (MindMed) Inc. (MNMD) Available online: https://ir.mindmed.co/news-events/press-releases/detail/131/mindmed-announces-positive-topline-results-from-phase-2b-trial-of-mm-120-in-generalized-anxiety-disorder (accessed on 18 December 2024)
  2. [69]MindMed Receives FDA Breakthrough Therapy Designation and Announces Positive 12-Week Durability Data from Phase 2B Study of MM120 for Generalized Anxiety Disorder: Mind Medicine (MindMed) Inc. (MNMD) Available online: https://ir.mindmed.co/news-events/press-releases/detail/137/mindmed-receives-fda-breakthrough-therapy-designation-and-announces-positive-12-week-durability-data-from-phase-2b-study-of-mm120-for-generalized-anxiety-disorder (accessed on 18 December 2024)

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Authors
Melani, A., Bonaso, M., Biso, L., Zucchini, B., Conversano, C., & Scarselli, M.
Affiliations
University of Pisa (IT)
Corresponding author
Scarselli, Marco
Venue
Pharmaceuticals
Publisher
MDPI AG
Published
2025-01-19
Volume
18
Issue
1
Pages
130
ISSN
1424-8247 (ISSN-L)
OpenAlex
W4406629036
Cited by
17
References
75
Citations by year
2026: 8 · 2025: 9
FWCI
3.74
Type
journal article
Language
en
Open access
Locations
  • Pharmaceuticals (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • CINECA IRIS Institutial research information system (University of Pisa) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Università degli Studi di Padova
Topics
  • Social Sciences › Psychology › Clinical Psychology › Psychedelics and Drug Studies
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Pain Management and Placebo Effect
Keywords
psychedelics, neural circuits, brain connectivity, default mode network, neuroplasticity, MDMA, psilocybin, LSD, treatment-resistant depression, post-traumatic stress disorder, anxiety, consciousness, functional connectivity

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