PS I cannot remember your son’s age I am sorry, but there is a great book called ‘hey warrior’ which helps explain the amygdala in the brain and the neuroscience behind an amygdala attack and how to calm it. It explains it in a simple way and I have used it a lot with primary aged children. It is about anxiety and I find a lot of kids respond to learning about why they behave the way they do. Even my 19 year old was willing to read it, I had to get him to do it by asking him to review it for younger kids, but it helped open up a conversation and he has become more curious about the neuroscience behind autism and melt downs as a result. I’d love to say it means they are less frequent or intense, that is still a work in progress, but it has made him more willing to engage in strategies when escalated and their duration is getting shorter. Here is a link to a short clip about the book
https://www.youtube.com/watch?v=fzhka72RV30