Well, according to this site, I was beyond help (lol!), as I was beyond stage 6: http://m.alz.org/stages-of-alzheimers.asp
I actually could care for myself, mostly, but it took an extraordinary amount of time for me to get dressed as I had to double and triple check I had all the clothes I needed on me, and was careful to never have to wear things that needed to be matched because of a pattern or design, not even socks, as I couldn't follow or recognize a pattern, but I could feed myself and use the bathroom/shower by myself.
My husband did have to watch over me when we went out, or I quickly got lost and had to "remind" me daily of what I was supposed to do that day and I had to write it down and immediately put the note in my pocket so I could cross them off the list each day as they got done, but they had to be in the order in which I needed to do them, or I couldn't follow the list.
I was having major panic attacks every time I left the house alone though (only to one grocery store and one drug store) had no working memory, couldn't really engage in any meaningful conversation due to severe memory issues.
I'm sure I'm not listing things, but quite honestly I spent the first few years after experiencing that, desperately trying to forget it and get past the fear it left in me. I do still suffer from some PTSD type symptoms when faced with interacting with someone with that level of dysfunction, but continue to work to get past it as I know what it feels like to have someone react negatively in some manner to behaviors I had no control over. It's a very sad experience in my life that humbled me as I had my cognitive functions return - something many people never get to experience.
Severe cognitive decline (Moderately severe or mid-stage Alzheimer's disease)
Memory continues to worsen, personality changes may take place and individuals need extensive help with daily activities. At this stage, individuals may:
Lose awareness of recent experiences as well as of their surroundings
Remember their own name but have difficulty with their personal history
Distinguish faces but have trouble remembering the name of spouse or caregiver
Need help dressing properly and may, without supervision, make mistakes such as putting pajamas over daytime clothes or shoes on the wrong feet
Experience major changes in sleep patterns
Need help handling details of toileting (for example, flushing the toilet)
Have increasingly frequent trouble controlling their bladder or bowels
Experience major personality and behavioral changes
Tend to wander or become lost
Very severe cognitive decline (Severe or late-stage Alzheimer's disease)
In the final stage of this disease, individuals lose the ability to respond to their environment, to carry on a conversation and, eventually, to control movement.
Individuals need help with much of their daily personal care, including eating or using the toilet. They may lose the ability to smile and/or sit without support. Reflexes become abnormal. Muscles grow rigid. Swallowing impaired.