It is very important that as well as feeding the brain nutrients and supplying healthy fats, oxygen and fluids, you provide it with stimulation.One of the causes of dementia is lack of stimulation. Visual, aural, verbal. For elderly people the world begins to shrink back until they are restricted in movement within a small space, with perhaps just the television or radio for company. Even with the television you will find that eventually there will only be one or two channels watched; the news, soap operas and more than likely Midsummer murders!This is why any social interaction is so important as we get older. For most, not all, our natural instinct is to recede to a safe zone but those who do stay in the world and continue to laugh, enjoy new music, movies, plays and group activities, stay mentally and physically healthier.About 12 years ago my friend and radio producer Kelli Brett and I put together a couple of programmes on the subject of laughter as one of our regular health segments. We called it the Laugh Academy and it went down a storm. It was intended to show how laughter is one of the most beneficial exercises you can participate in without spending a fortune or damaging a muscle – well I believe that there were one or two cases where someone laughed themselves into a heart attack but it was nothing to do with our show – honest.