And parasites are behind brain stuff...

And parasites are behind brain stuff especially the dementia type stuff. When they eat that piece of brain with the memory in it--why would you be able to remember it? Or eat the area that allows you to make new memories. No, you won't remember today.

The older memories survive because they are in more places as each time you remember a memory, it's stored in a spot for that, too.

I think where they are eating is what symptom they manifest--like if they're in your impulse control area--yeah rage, irritability, you name it. Just look at what a head injury does. The parasites are a walking head injury.