my husband has been diagnosed with early onset cognitive impairment.  there have been many moments of angry outbursts from him directed at me for no apparent reason.  I have discovered that when he does not take his medicine (aracept in peticular) he goes bonkers on me.  So now I check him on a regular basis daily.  What has really worked for our situation is when I made it very clear that I am not giving up anymore of what I have left in life to take his abuse.  I am going on 70 and he is 75.  I then went on to ignor and avoid him for several days and that ....more then anything scared the crap out of him because now he had to fix his own meals,do laundry, had no one to talk to and forget any social engagments. Life, as he knew it, stopped dead.  He finally admitted that he could not live without me and did not mean any of the things he was saying when he hollered at me.  I said as long as you are nice to me I will never leave you but the moment you start calling me names and treating me badly.....I am gone for good.  This is your problem.....not mine.  hope this is of some help.please let me know.