Hi susan w
I do agree that one of the trickiest things when looking after someone is the unpredictability of their behaviour and responses.
Have you seen 'compassionate communication' - hopefully this is a link to it:
http://forum.alzheimers.org.uk/showt...emory-Impaired
I think Bod has a point - maybe your mum's meds could be tweaked, or her GP might suggest something new to help her, so a visit next week may be a good idea. Go armed with a written list of the behaviours that are causing you concern - I tend to write things down as I forget some key points when I'm sitting in the surgery.
Maybe you both need a bit of a break - have you had your mum's needs reassessed recently, and had a carer's assessment? Maybe your mum would benefit from some time at a day centre where she could channel some of that emotional energy into activities and have some different company to engage her?
best wishes