Use it or lose it?

Reigh Le Blanc © flickrEver wanted to help advance medical research but want to keep your distance from any needles? Well, the BBC has teamed up with medical researchers and is looking for 100,000 volunteers to test whether brain training works.

The aim of the experiment, launched tonight, is to find out whether mental workouts really do exercise our brains and help prevent the onset of dementia. Brain Test Britain wants to find people willing to do 10-minute online brain training exercises three times a week for at least six weeks.