The Geometry of Recovery: Accessibility Expansion, Insight, and Adaptive Change
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Psychedelic research has repeatedly linked compounds such as psilocybin to increased neural entropy, reduced network modularity, enhanced psychological flexibility, insight, and sustained improvements in well-being. Yet the relationship among these phenomena remains poorly specified. Entropy, plasticity, relaxed priors, and network reorganization describe important features of psychedelic states, but they do not fully explain why perturbation sometimes produces adaptive recovery rather than disorganization. This paper proposes that the missing explanatory variable is accessibility.
Building on Persistence Geometry, this paper argues that adaptive systems are governed not only by what futures are possible, but by which futures remain reachable, viable, and recoverable from a given position within a landscape of possibilities. From this perspective, entropy is not the therapeutic outcome. It is a perturbative mechanism capable of temporarily reorganizing accessibility structure. Psychedelic perturbation may expand the set of reachable trajectories, allowing systems to explore futures that were previously inaccessible under ordinary constraints.
Within this framework, insight is interpreted not as the acquisition of new information, but as the recognition of newly reachable trajectories. Psychological flexibility reflects expanded access to multiple viable futures. Recovery occurs when systems regain access to viable pathways that had become constrained, collapsed, or unreachable. This interpretation reframes psychedelic change as a process of accessibility expansion followed by exploration, selection, and stabilization.
The framework also clarifies why increased entropy alone is insufficient. Adaptive change requires perturbation to remain bounded by viability and recoverability constraints; otherwise, exploration becomes destabilization rather than recovery. By linking entropy, flexibility, insight, and recovery through the geometry of reachable futures, this paper offers a unified account of psychedelic-assisted adaptive change and proposes a broader theory of recovery as restored reachability within persistence landscapes.
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References
- Hunt A - Hunt, T. (2026). The Geometry of Time: How Cognition Emerges from Persistence Across Temporal Scales. Hunt B - Hunt, T. (2026). Continuity Beyond Survival: Persistence, Failure, and Viability Across Complex Systems. Hunt C - Hunt, T. (2026). Trauma as Accessibility Collapse: Persistence Dynamics, Metastability, and Reconstructive Viability. Hunt D - Hunt, T. (2026). Living Information Theory: Morphogenesis as Compression-Driven Navigation on an Information-Geometric Substrate. Hunt E - Hunt, T. (2026). Control Before Cognition: Nervous Systems as Logic-Gated Behavioral Architectures. Hunt F - Hunt, T. (2026). Control Before Cognition in Fungal-Invertebrate Systems: Mycelial Information Geometry, Noise-Driven Selection and Behavioral Suppression. Hunt G - Hunt, T. (2026). Regulated Entropy Injection Theorem: A Living Information Theory Extension on Persistence, Noise, and Play. Hunt H - Hunt, T. (2026). What's in a Laugh? Persistence, Play, and the Regulation of Variability Under Noise. Hunt I - Hunt, T. (2025) From Morphogenesis to Mind: Developmental Intelligence as Navigation on Information- Geometric Landscapes. EXTERNAL LITERATURE Carhart-Harris, R. L., Leech, R., Hellyer, P. J., Shanahan, M., Feilding, A., Tagliazucchi, E., Chialvo, D. R., & Nutt, D. J. (2014). The entropic brain: A theory of conscious states informed by neuroimaging research with psychedelic drugs. Frontiers in Human Neuroscience, 8, 20. Carhart-Harris, R. L., & Friston, K. J. (2019). REBUS and the anarchic brain: Toward a unified model of the brain action of psychedelics. Pharmacological Reviews, 71(3), 316–344. Daws, R. E., Timmermann, C., Giribaldi, B., Sexton, J. D., Wall, M. B., Erritzoe, D., Roseman, L., Nutt, D. J., & Carhart-Harris, R. L. (2022). Increased global integration in the brain after psilocybin therapy for depression. Nature Medicine, 28, 844–851. Davis, A. K., Barrett, F. S., & Griffiths, R. R. (2020). Psychological flexibility mediates the relations between acute psychedelic effects and subjective decreases in depression and anxiety. Journal of Contextual Behavioral Science, 15, 39–45. Doss, M. K., Madden, M. B., Gaddis, A., Nebel, M. B., Griffiths, R. R., Mathur, B. N., & Barrett, F. S. (2021). Models of psychedelic drug action and cognitive flexibility. Frontiers in Psychology, 12. Ionescu, T. (2012). Exploring the nature of cognitive flexibility. New Ideas in Psychology, 30(2), 190–200. Lago, M., Cerveira, M., & Simonet, J. X. (2026). Transient multidomain functional improvement in advanced Alzheimer's disease following high-dose psilocybin-containing mushroom administration: A case report. Frontiers in Neuroscience. Ly, C., Greb, A. C., Cameron, L. P., Wong, J. M., Barragan, E. V., Wilson, P. C., Burbach, K. F., Soltanzadeh Zarandi, S., Sood, A., Paddy, M. R., Duim, W. C., Dennis, M. Y., McAllister, A. K., Ori-McKenney, K. M., Gray, J. A., & Olson, D. E. (2018). Psychedelics promote structural and functional neural plasticity. Cell Reports, 23(11), 3170–3182. Lyons, T., Spriggs, M., Kerkelä, L., et al. (2026). Human brain changes after first psilocybin use. Nature Communications. Miyake, A., Friedman, N. P., Emerson, M. J., Witzki, A. H., Howerter, A., & Wager, T. D. (2000). The unity and diversity of executive functions and their contributions to complex "frontal lobe" tasks: A latent variable analysis. Cognitive Psychology, 41(1), 49–100. Scott, W. A. (1962). Cognitive complexity and cognitive flexibility. Sociometry, 25(4), 405–414. Siegel, J. S., et al. (2024). Psilocybin desynchronizes the human brain. Nature. Tagliazucchi, E., Carhart-Harris, R. L., Leech, R., Nutt, D. J., & Chialvo, D. R. (2014). Enhanced repertoire of brain dynamical states during the psychedelic experience. Human Brain Mapping, 35(11), 5442–5456. Uddin, L. Q. (2021). Cognitive and behavioural flexibility: Neural mechanisms and clinical considerations. Nature Reviews Neuroscience, 22, 167–179. Varley, T. F., et al. (2023). The serotonergic psychedelic N,N-dipropyltryptamine alters information-processing dynamics in cortical neural circuits. Zeifman, R. J., Spriggs, M. J., Kettner, H., Lyons, T., & Rosas, F. E. (2025). From relaxed beliefs under psychedelics (REBUS) to revised beliefs after psychedelics (REBAS). Scientific Reports, 15.