[Paleopsych] The Franklin Institute on Neurobics (brain exercises)

[G. Reinhart-Waller]

>>Severe mental decline is usually caused by
disease, whereas most age-related losses in memory or 
motor skills simply
result from inactivity and a lack of mental exercise 
and stimulation. In
other words, use it or lose it.>>

Depends.  No matter how often one engages in physical 
exercise, his body will show signs of aging.  The same 
is true for mental exercise.  Use it or lose it is only 
true up to a certain age.  All skin wrinkles....

Gerry