Janet I am so sorry you have had to go thru such a traumatic childhood and many have.

Every experience good and bad changes us as it creates pathways in our plastic brains. So these things have to affect us and it takes hard work to create new positive pathways - these can't help but change us physically as well.

Two really good books are The Brain That Changes Itself by Norman Doidge and The Plastic Mind by Sharon Begley.
I think these are essential reading for those with any disability or anyone treating them.