There is an excellent video series on VideoWest documenting a woman's descent into dementia. In 2010, Gera Saunders learned she has dementia. She was 61 at the time of her diagnosis and a professor at the University of Utah.
To view the series (at this writing there are three videos and will be more later), go to http://videowest.kuer.org/gerda-series/
It gives you the perspective of being the person cared for rather than the caregiver. I highly recommend it. While you may not agree with her stance on end of life, she gives us a glimpse into her life and her family as they deal with this unwanted life event.
Donna Kemper put aside her art career to care for a mother she hadn't seen in over a decade. For seven years she followed her mother's journey into dementia, caring for her and putting forgiveness into action.