What goes through their mind...

I go to her house at the same time each night.  Sometimes she is already in bed, but other nights she is up watching her TV shows. She responds to them, you know, comments on something said, laughs a little and even asks a question or two.  Of course, other nights she just sits there.  Her daughter will ask if she’s ready for bed.  Sometimes she will say no, and then start to fall asleep in the chair. 

She can’t see very well at all, sometimes doesn’t even see me sitting in the room.  But she will always respond to you if you talk to her.  She also still notices outside noises, for instance, my cats follow me over sometimes.  It’s kind of funny. They meow at the door or window looking for me.  They are quite persistent.  She will look at the door and ask about the noise.  

What do people with Alzheimer's think about?  Are they trying to wrap their brain around reality? How does it feel to have people around you that you don't know any more?