Studies: adults who stimulated their brain (e.g., reading, playing chess/bridge, listening to music) were 2-5 times less likely to develop Alzheimer’s. (Greenwood-Robinson, Maggie, PhD. 20/20 Thinking. p 218-219, 305. NY: Avery, Putnam Special Markets, 2003.)
Individuals with Alzheimer’s disease are still able to remember songs, especially the songs of young years. This is in spite of their losing massive amounts of other types of memory. (Lynch, Zack, PhD with Byron Laursen. The Neuro Revolution. How Brain Science is Changing Our World, p. 124-125. NY: St. Martin’s Press, 2009.)
Refer to Dysfunctions of the Brain for additional information.