This link leads to an explanation of the "Neuroplasticity Hypothesis":   This hypothesis explains that Alzheimer's disease attacks particular brain mechanisms related to the capacity of the neural networks of the brain to learn new information.  The loss of that ability is the central problem in Alzheimer's disease.  This hypothesis was originated by Ashford and Jarvik in 1985.

            see:  AlzForum Live discussion

For several other hypotheses, see http://www.alzforum.org/members/index.html

Other research and links can be found at:

     http://www.alzheimers.org/ (ADEAR)

     http://www.worldeventsforum.com/ (World Event Forum)

     http://www.alz.org/ (Alzheimer's Association)

     http://www.aagpgpa.org/ (American Association of Geriatric Psychiatry)