Many studies have shown positive effects for healthy laugh. Scientific evidence has shown laughter can lower blood pressure and increase tolerance to pain.
Research conducted by researchers from New South Wales in Australia shows that humor can reduce agitated behavior in dementia patients as much as 20 percent.
A total of 400 residents of nursing homes that most of the experience of dementia participated in this study. The researchers looked at the effects of a given humor humor therapist named Jean-Paul Bell on 200 people live in nursing homes.
The humor is sometimes the therapist acts as a clown doctor at a children's hospital. But for this time trial, he was dressed like a normal elevator workers.
Mr. Bell smiling, chatting with an imaginary figure using a set of old phone and waving a magic wand as he asked the residents about what they want.
In some nursing homes, therapists humor sometimes act as clowns in an old joke, story, music and magic to help stimulate the memory and cognitive function.
For example, an old clown dementia patients ask someone to tell or give some advice on life. Clowns can also act stupid or deliberately giving wrong instructions to the nursing home residents to tell the clowns what he should do.
"There is evidence to suggest that people with dementia can still understand the humor and the same amount as normal people, but they find funny is different," said researcher Dr Lee-Fay Low of the University of New South Wales as quoted by the Huffington Post, Thursday (22 / 9 / 2011).
According to him, some nursing homes are very focused on tasks such as bathing, feeding, and cleaning. And sometimes forgot the emotional needs of their inhabitants.
In an article published in the journal BMC Complementary and Alternative Medicine last year, a researcher from Japan to investigate why laughter can be used as an alternative therapy for patients with dementia.
He wrote that laughter is considered beneficial to human health for a long time. Some benefits include increased terawa immune response, hormone function and tolerance to pain.
However, researchers noted that humor must be managed and presented properly, because patients with dementia can become upset if the joke was deemed offensive.