What Advice Can You Provide For A Debilitated Person With Lost Hope?

October of 2015 My mom went to the hospital because her face had gotten swollen after getting her tooth pulled.. Her face had got so big that it covered her airway and she lost oxygen to her brain. The doctors had to resuscitate her. she went through having to use a breathing machine (witch she has been off for 1 year and a half now) but every since then she has lost her ability to talk and her ability to walk, her arms are stuck in one position and he is extremely emotional. she is able to understand everything and she remember everything she answers yes and no by nodding her head.. i have faith that she can come out of this but i feel as if i can do a lot more to help her out of this. so is there any advice or something that you guys think i can do, that will make her less emotional and give her a little hope shes a strong women and was extremely healthy before this its been 3 years almost and shes go