Suggest Treatment For Difficulty In Functioning Of Legs And Arms

my mother is 45 and is having some problems with her arms and legs. they havnt been functioning right for the past few months, basicly they give way and finds it hard to walk and move her arms, which has recently goone worse. the werid thing is she is in no pain. She has noticed the past few days finding it hard to brethe but i think that is due to stress because of this. She has been to a neurologist who has referred her for an MRI scan and they think it could be crumlbing spine, but the scan is a few weeks away, and she is getting very distrested. the only past medical issues she has had is osteoperosis due to being anorexic for a few years about ten years ago and smokes about 20 cigs aday, which could possiable contribute to this.