Mine was from a brain injury I sustained from falling down a metal staircase while visiting a mate.
on the MRI it showed 3 areas of my brain that had been badly damaged the visual cortex parietal lobe temperol lobe.
I have depersonalisation of the hands and feet but derealisation all the time which makes me very homesick, although I am home. I keep getting the feeling that I am now in a parallel universe similar to my own but I know this is not right. I feel that people that know me only think i am who they think i am but i feel as if i am an imposter and not the jill they knew before. I am the other jill from the other universe.
It is just a feeling, but it is with me every day and it drives me crazy. Even when I want to go for a bath, I am worried as I alwways feel as if i am not in the place i see around me, I could be out in the street for all my feelings are telling me.
The brain is a complex organ.......all the best ....jill