Nails wrote:The Beige Avenger wrote:It's not 'normal'. Essentially it is 'over heating' portions of the brain causing them to 'burn out'.
The name should give it away really.. "Disease"...

/sarcasm
Sometimes I wonder if such posts are justa test, to see how knowledgable or serious about science we are, especially when posted by a newbie.
please accept my apologies if this is not the case.....
I think we have to take almost 100% of forum posts with a pinch of salt. Usually they are written rather quickly but with genuine motives behind them, sometimes they are written poorly, sometimes written with the precise intent of starting arguments.
This particular one... well, I can see where it's coming from.
Like, arthritis, deteriorating vision / hearing... they're so common in the elderly that they could probably be considered as 'normal' ageing. Which in a way it is - wear and tear... but it's not 'normal' per se as these conditions can be minimised by having a healthy life and they are not in all the elderly people.
Caveats apply as it is entirely possible that the information contained in the above post is either an attempt at a wind-up, an attempt at a joke or just plain wrong.