Well, remember Hellion, PTSD, is an "anxiety disorder" and anxiety does tire out the brain. Disassociation is something everyone does, it is the brains way of taking a break actually. It isn't an "evil bad thing" that means you are crazy either. And sometimes digging through our memories of the past is tiring too, so taking it slow and easying up is sometimes helpful.

Sometimes however we are trying to remember and at the time something upsetting was happening we may have actually disassociated to self protect, that happens alot too. It is a part of how we survive sometimes, we can sort of shut down so we don't get overwhelmed with fear or emotions. The brain is pretty amazing you know, it can do things we don't understand on a conscious level to self protect.