The Light is on

Imagine having this big house, the lights are on in every room- Its full of life, family, memories, ideas, parties and happenings.
Slowly the house is abandoned. Over time, one by one, a light goes off until there are just a few of them on. Every now and again, one of those lights that hasn't been on in months- flips back on for a few minutes, but of course it eventually burns out completely. Eventually there are just a few lights on in this big beautiful home, but it is still there, trying to shine again.. to turn its lights on again.....
This is how I imagine the Alzheimers brain.