Is it legal to get a mortgage in a deceased person’s name?

Is it legal to get a mortgage in a deceased person’s name?
If I live in my mother’s house, and I have power of attorney at her death and I am the executor of her estate, and all of her assets are distributed to me, is it legal for me to keep the home in her name, and obtain loans in her name if the will states it? Also can I keep the joint accounts that are in mine and her name like checking account, credit card, etc the same, with her name on them?

I was in a severe car accident a couple of years ago; I was in a medically…

I was in a severe car accident a couple of years ago; I was in a medically induced coma and then was unable to take care of myself for a while afterwards due to a traumatic brain injury. Because of this, my mother was able to get power of attorney. I suspect that my mother received settlement money from both Menard’s (the company whose truck I was in an accident with) and her insurance company. How would I go about finding out if anything like this took place without my knowledge?
I was told she got power of attorney over me, in order to make medical decisions, but I believe the next of kin has that right without a power of attorney, if you are unable to make decisions for yourself.