For psilocybin, there is plenty, e.g.: https://pmc.ncbi.nlm.nih.gov/articles/PMC8376772/
I think defining “permanent” would first be useful. The brain is extremely plastic.
Beyond that, OP comment was referring to psychosis effects. See his comment below.
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For psilocybin, there is plenty, e.g.: https://pmc.ncbi.nlm.nih.gov/articles/PMC8376772/