SemperParatus on Nostr: The concept of "chrmical memory" is based on experiments conducted in the 1950s and ...

The concept of "chrmical memory" is based on experiments conducted in the 1950s and 1960s, primarily by James McConnell, who worked with planarians (flatworms), not leeches. He trained planarians to respond to certain stimuli, then ground them up and fed them to other planarians. He reported that the recipient planarians seemed to learn the task more quickly than those that were not fed the trained planarians.

However, these findings have been met with skepticism and **have not been reliably replicated** and the idea of "chemical memory" as proposed in these experiments is not widely accepted today. Memory is now generally understood to involve neural networks and synaptic changes, rather than something that can be transferred through ingestion of another organism's tissue.