> Not everyone loses neural plasticity. Some people are as sharp at 90 as at 25. Is there documented evidence of this. Some people do better than others, obvio

> Not everyone loses neural plasticity. Some people are as sharp at 90 as at 25. Is there documented evidence of this. Some people do better than others, obviously, but I find it hard to believe that anyone has literally as much plasticity at 90 as they did at 25. > Some begin to decline in their 20s (especially if heavy use of drugs is involved). Probably should be more specific than "drugs", since most drugs have no effect on neuroplasticity, and some drugs appear to actually enhance it.