Wow sounds serious. There is a lot of anger there and rage. All I can suggest is that when she is normal take her to beautiful/sacred places and help her to feel love and appreciation for even the smallest of things. Only love can conquer this. And when she has an episode, to practice compassion and love for her not fear and confucion, this will only feed the inner rage. She must learn to love and accept her own spirit back into her worthy body. This must be facilitated because she is too weak to do it on her own. Maybe she should move away from that place and into a new one with fresh positive influences and energy. Your mother may act with the compassion of the mother Mary or even Jesus. This will help her to help her daughter. I too will pray for her and the whole family. May you all stay strong in your loving convictions.

I had a friend several years ago who went through something very similar--the same signs/symptoms you speak of. As for moving to a new place with positive energy, sounds like a good idea. My friend did that and it eased. I agree with focusing on the lightwork and taking her to beautiful,sacred places. However, the strength must ultimately come from within your sister. Fight for her so she can get strong again. I hope your sister improves and finds herself again.

I myself belive in possesions but there is so much criteria that has to be met to determine an actual demonic possesion
Is all this negative energy just geared towards your sister is there anything that you may have noticed about the place or with certin objects.
My reason for asking is I'm a ghost hunter in the Paranormal field and what you have discribed can go either way
Demonic Posession or a haunting so to speak

Hi Madam Lunar,

IMO, Your sister isn't possessed by Satan no matter what those Christian sites are probably telling you. I say this because, an external 'demonic' presence controlling your sister would not refer to itself as Satan, burn bibles, or talk about stealing souls because these are only artificially anathema to certain people who have learned those phrases; this is evidence that it is something psychological.
You don't say what kind of muscular dystrophy she has, but I have heard that in adulthood a person can develop violent behavior that wasn't there in childhood; I'm wondering how old she is, because the onset of puberty creates a lot of horrid hormonal changes in girls; she should have her serotonin levels checked. Since she's physically handicapped other mechanisms could take over, if she's dealing with low serotonin and so depression, the more lower, intuitive mechanism might be acting out a lot of buried anger and depression, and its a very strong primal force; the best thing you can do is work out the emotional problems with your family. (Which is probably a lot more difficult that dealing with some silly demon! seriously!)