Speaking Welsh may delay onset of Alzheimers

"SPEAKERS of Welsh and English might have more than their bilingualism as an advantage over monolingual counterparts.

Because scientists believe being bilingual – a state familiar to generations in Wales brought up on the likes of Sali Mali from their earliest days – exercises the brain and protects against Alzheimer’s disease.

[...]

The study showed bilingual Alzheimer’s patients developed symptoms several years later than those who spoke only one language."

Read More http://www.walesonline.co.uk/news/wales-news/2011/02/19/speaking-welsh-may-delay-onset-of-alzheimer-s-91466-28196591/