We end up storing the memory with wrong interpretations (like we're not good enough and that's why we're having the trauma happen to us) in our right brain..
This also skews with the fight/flight/freeze of our amygdala which interprets anything that resembles the original trauma, as if it's dangerous.. So a certain shaped room can trigger our amygdala's freak response instead of allowing our left brain to interpret things correctly,,, thus, things like PTSD and anxiety disorders..
This is my favorite, just watch the balloon on a large screen..
This vid has a person doing the EMDR....