Mechanisms
Synaptogenesis & Spine Density
Depression isn't just chemical — it's structural. Ketamine appears to rebuild what stress has pruned.
Medically reviewed by: Pending medical review(draft)Last updated: June 4, 2026Evidence: Li et al. 2010, 2011; Moda-Sava et al. 2019
What the imaging shows
- Chronic stress reduces dendritic spine density in prefrontal cortex.
- Ketamine increases spine density within 24 hours in animal models.
- The new spines stabilize over days — but only if not re-pruned by ongoing stress.
Why integration matters
New synapses are use-dependent. The behaviors, relationships, and thoughts you engage in during the days after a session shape which new circuits get reinforced and which fade. This is the biological case for deliberate integration work.
Educational use only. The content on this page is provided for general educational purposes and does not constitute medical advice, diagnosis, or treatment. Ketamine and related therapies carry risks and are appropriate only under qualified medical supervision. Always consult a licensed healthcare professional about your individual situation. Information may change as research evolves.