I just discovered this website and these discussions and just wanted to thank all of you for your comments. Many of them have been very helpful. I am most comforted by the fact that there are others out there going through similar situations as mine. My mom is 86 and has had one TIA about a year ago and more recently a small stroke. Although she recovered from the stroke with minimum damage, she can no longer be left alone 24/7 and needs supervision with her meals as she is no longer able to safely prepare them by herself. I have one sister who recently retired to take care of my mom and then I try to provide the "respite" care when possible. My mom has always been a very cold and hurtful person, so my sister and I have had a lifetime of dealing with her rejection, her meanness and her personality changes. She tries to play us against each other and tells each of us, as well as other family members that we said things we didn't say!
I do have a couple of comments/suggestions that might help. One is to encourage everyone who is going through similar situations to just keep trying. All of the suggestions about MRIs and checking medications, etc. are very good. I don't think anyone really has an answer and you just have to keep trying until you find something that works.
To Suze, I just want to say that if you are still working for that woman after ten months, you are to be commended. I think any threats of hurting someone, etc., should always be taken seriously and I agree that her family needs to know about her behavior. The suggestion of making a video or at least taping some of her episodes was very good in case no one believes you. You also do need to take care of yourself and not be in the house with this woman 24/7.
Another suggestion is to do your best not to take these episodes personally. I've found that my mother has her "mean" episodes when she is not feeling well, when she is in pain and/or when she is really depressed or anxious over something. I've come to realize that she struggles greatly over the concept of her decline in being able to do for herself and with her possible death. She is extremely resentful of my sister because my sister "has" to help her now and she aims a lot of her anger and bitterness at my sister for this reason. She accuses us of "just sitting around watching her and waiting for her to die," but I've come to realize that is her own personal struggle and feelings, so when she makes those accusations, I try to talk to her about them.
Also, keep the communication open between yourself and other family members or the family you are working for. My sister and I have an "agreement" not to believe anything my mother tells us about the other person and we stay in constant contact with each other. My mother hates the fact that we talk to each other, but some things are just necessary.
Lastly, God has called us to love one another, even the ugliest of people, and I believe He has called us to care for our elderly ourselves and not stick them in nursing homes unless absolutely necessary. He will give us the strength and wisdom we need each day. Through my relationship with him I have come to learn how to "love" people like my mom who are often unlovable! With His help and His strength, I can do all things....even suffer my mom's abuse without being personally hurt or wounded. When I take myself out of the picture and focus more on the source of her meanness and what she must be going through, I am able to cope. I encourage anyone who is going through this with an elderly person, to get involved in some kind of support group or have a good group of friends to talk to, and certainly the FAMILY of any elderly person who is being abusive should be informed! God bless you all and remember -- you are not alone!