Very interesting about the disorientation vs speech.
My Mom's first symptom was loss of a sense of time, and later place. My first clue (which I missed) was when I flew to NY to visit her, years before I moved in with her, and she had forgotten I was coming. She always had the spare bed made up and food ready, etc. but this time she didn't even answer the doorbell to buzz me in.
As soon as I did manage to get into the building and into the apartment she covered up masterfuly (speech and flow of words excellent) at first saying 'but you came in so early!' (not so!) and then "I fell asleep and forgot the time" (but the bed etc would have been done early in the day.) After that I had my own keys for trips to NY.
Later she got lost going to familiar places. She probably fell and broke her hip as a result of being disoriented in the house where she had been living only 3 months, in the dark, having turned off the lights 'to save money.'
As to broken bones being a side effect of AD, that makes sense too - if she hadn't turned off the lights and hadn't miscalculated the number of steps, she would not have fallen, broken her hip, and wound up in the Hospital and NH.
Somehow I am glad she still has speech. It must be so much harder when the person can't explain what is bothering them. Mom still holds a phone conversation in which she pretends to know who I am but gets all the facts wrong; yet they would sound plausible to a person who barely knew her.
Her mathmematical abilities (ciphering) went a long time ago, it has been years since she could balance a check book or know how to keep a record of her bills paid - just threw everything into a drawer. When I closed up the house last year I went through 20 plus years of paperwork, unsorted. A nightmare. The most recent and important items were missing, since she began throwing everything out a few months before that move.
I still wish I had managed to get her into care a year or even 2 earlier, it would have saved me a lot of worry, fear, unpleasantness, and even poor health. I am sure some of my anger directed at my sister for not believing Mom had AD was a direct cause of stress. We get along better now but she has not come to see me - one state away - nor invted me to come there. I feel she blames me for leaving Mom, moving her to B's house, the fall, the fracture and the NH.
That is not impossible - I also blame myself to some extent. I do know that if Mom had been where she is now, there would not have been a staircase to fall down ...
Safe, warm, fed, medicated, entertained, dry, not smelly, not messy, not lost, not in danger, not making fires ... a NH is a good place. Why do so many still see it as a dumping ground

for perfectly normal, healthy, functioning old people with lazy, uncaring daughters? (sons of course are excused!)
Love,
Martha