From this article in Nature:
https://www.nature.com/articles/d41586-024-00930-y
"When a long-term memory forms, some brain cells experience a rush of electrical activity so strong that it snaps their DNA. Then, an inflammatory response kicks in, repairing this damage and helping to cement the memory, a study in mice shows."
(There are so many metaphors in this, just waiting for us to harvest them.)