I thought this was an interesting article:
mobile.nytimes.com
Here is the original publication:
www.eneuro.org
What interested me was coming across this concept of an engram. Engram is defined as
This got me thinking what about psychedelics and this concept of engrams. Then I came across this article:
www.ncbi.nlm.nih.gov
Interesting stuff. Epigenetics memory psychedelics....

Scientists Made Snails Remember Something That Never Happened to Them (Published 2018)
When scientists injected RNA from the brain cells of trained snails to untrained snails, the animals behaved as if they remembered the trained snails’ experiences.
Here is the original publication:

RNA from Trained Aplysia Can Induce an Epigenetic Engram for Long-Term Sensitization in Untrained Aplysia
The precise nature of the engram, the physical substrate of memory, remains uncertain. Here, it is reported that RNA extracted from the central nervous system of Aplysia given long-term sensitization (LTS) training induced sensitization when injected into untrained animals; furthermore, the...

What interested me was coming across this concept of an engram. Engram is defined as
a hypothetical permanent change in the brain accounting for the existence of memory; a memory trace.
This got me thinking what about psychedelics and this concept of engrams. Then I came across this article:

Hypothesis: The Psychedelic Ayahuasca Heals Traumatic Memories via a Sigma 1 Receptor-Mediated Epigenetic-Mnemonic Process
Ayahuasca ingestion modulates brain activity, neurotransmission, gene expression and epigenetic regulation. N,N-Dimethyltryptamine (DMT, one of the alkaloids in Ayahuasca) activates sigma 1 receptor (SIGMAR1) and others. SIGMAR1 is a multi-faceted stress-responsive ...

Interesting stuff. Epigenetics memory psychedelics....