[Maybe it’s my age, but this article from The Telegraph makes sense to me. Thanks to Verne Meade for sending me this.]
Brains of elderly slow because they know so much
The brains of older people only appear to slow down because they have so much information to compute, much like a full-up hard drive, scientists believe.
Older people do not decline mentally with age, it just takes them longer to recall facts because they have more information in their brains, scientists believe.
Much like a computer struggles as the hard drive gets full up, so to do humans take longer to access information, it has been suggested.
Researchers say this slowing down it is not the same as cognitive decline.
…….READ THE REST OF THE ARTICLE AT http://www.telegraph.co.uk/science/science-news/10584927/Brains-of-elderly-slow-because-they-know-so-much.html.