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Structural plasticity and enhanced fear extinction following psilocybin in chronically stressed mice

Knox, C. A.; Woodburn, S. C.; Gilbert, A. D.; Schlotzhauer, J. M.; Kwan, A. C.

2026-04-22 neuroscience
10.64898/2026.04.21.720014 bioRxiv
Show abstract

The classic psychedelic psilocybin elicits long-lasting neural plasticity and behavioral effects, but prior studies largely examined stress-naive animals. Using longitudinal imaging, we show that psilocybin increases dendritic spine density in frontal cortical neurons and facilitates fear extinction after chronic restraint stress, demonstrating psilocybins effects in a translationally relevant mouse model.

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