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This 8-min micro-lecture summarizes a Page et al's scientific perspective on Major Depressive Disorder (MDD) that moves beyond the traditional serotonin deficit hypothesis (Page et al., 2024). I. Overivew The perspective of depression as a simple chemical imbalance has been endorsed for decades, resulting in a focus on pharmacotherapeutic interventions. More recently though, a variety of research findings endorse a new framework for understanding depression that emphasizes the pathophysiological role(s) of cognitive and emotional inflexibility and endorses neurplasticity as the primary therapeutic mechanism of action. In their 2024 review, Page and colleagues summarize findings that support this new neurplasticity framework for depression. Under this framework, biological and environmental stressors cause brain circuits to become stuck in rigid, negative processing patterns. II. How Depression Affects the Brain The review highlights how chronic stress and maladaptive learning can lead to: (1) Persistent negativity bias. (2) Reduced synaptic density. (3) Rigid patterns of thought and emotional response. These changes make it difficult for individuals to shift out of harmful mental loops, reinforcing depressive symptoms over time. III. How Treatments Restore Flexibility A key insight from the paper is that many effective treatments—whether antidepressant medications, psychotherapy, or psychedelic‑assisted therapy—share a common mechanism: they promote neuroplasticity. By enhancing the brain’s capacity to adapt, these interventions help rewire dysfunctional circuits and support healthier emotional and behavioral patterns. IV. Communicating the Neuroplasticity Model To help the public better understand this updated framework, the authors propose using relatable metaphors. Depression can be compared to: (A) A car stuck in a ditch that needs traction to get moving again. (B) A limb recovering from injury that requires physical therapy to regain function. These analogies emphasize that healing involves restoring flexibility, not simply correcting a chemical shortage. V. Why This Matters By reframing depression as a disorder of neural rigidity, this model integrates biological, psychological, and experiential factors into a unified explanation. It also highlights why treatments that promote plasticity—whether pharmacological or behavioral—can lead to meaningful, long‑term recovery. Source: Page, C. E., Epperson, C. N., Novick, A. M., Duffy, K. A., & Thompson, S. M. (2024). Beyond the serotonin deficit hypothesis: communicating a neuroplasticity framework of major depressive disorder. Molecular psychiatry, 29(12), 3802–3813. https://doi.org/10.1038/s41380-024-02... PDF: https://pmc.ncbi.nlm.nih.gov/articles... #neuroscience #depressionresearch #neuroplasticity #neuralplasticity #mentalhealthscience #mentalhealthresearch #mentalhealth #depression #MDD #brainhealth #psychedelicresearch #psychotherapy #antidepressants #cognitiveflexibility #ssri #ssris #stress #stressmanagement #mentalhealth #bdnf #plasticity #psychedelicscience #psychedelictherapy @BrennaBrayPhD @NIMHgov @NIH_NCCIH @NIHVideoCast @Motivate_Neuroplasticity @neurogenesisinstitute2659 @BBRFoundation @TheAPAVideo @AmericanPsychiatricAssociation @nunmedu @naropauniversity @naropaallianceforpsychedel7015 @StudentsVeteransNaropa @SpeedPharmacology @AM_Fouda @neurochallenged @Neuroscience @DrCarolineLeaf @BosqueNeuroscience @prsneurosciences @uofubraininstitute @PacificNeuroscienceInstitute @novapbs @altheapbc @cuboulder @CUAnschutzWell @brainfacts @BrainFactsorg @UrduBrainFacts @brainfactsx @BRAINFACTS-77 @brain_factss1 @Brain_Facts_Bd @sumaiyaafrin4235 @Brainfacts1234 @MentalHealthTreatment @mentalhealth @MHM4ALL @AuthenticMentalHealth @mensmenstalhealthinstitute @Psychedelic @ThePsychedelicScientist @mapsmdma @psychedelicsupport @PsychedelicSpotlight @psykedeliskvetenskap @PsychedelicUniverse @PsychedelicUniverse @psychedelicminiatures @PsychedelicsCom @PsychedelicsToday @stanfordpsychedelicscience12 @yalepsychedelicsciencegrou9534 @psychedelicscienceorguk28 @OxfordPsychedelicSociety @YalePsychiatry @stanfordpsychiatryandbehav9531 @departmentofpsychiatryuniv763 @NYUAppliedPsych @JohnsHopkinsMedicine @JohnsHopkins @mghcenterfortheneuroscienc28 @UCBCSP @JoshNeuroplasticitySchool @NeuroplasticIdeas @rababsyedinstitute @mindscapeinstitute @psychedelicsomatic @ResetKetamine @SPRAVATO