The relationship between laughter and the brain is not fully understood, but you can bet they are working on it. The physiological study of laughter is called gelotology, and there are actually researchers who study humor and laughter and how they have an impact on the brain.
A friend of mine corresponds with Hunter â€œPatchâ€ Adams, the doctor who was the inspiration for the Robin Williams movie. â€œPatchâ€ does actually study humor as a science, and learned early on that â€œhumor, joy and creativityâ€ send out signals to the brain that actually aid in healing. Each year he organizes a group of volunteers from
around the world to dress as clowns and travel to various countries in an effort to bring humor to orphans, patients, and other people. Says Dr. Adams, “I interpret my experience in life as being happy. I want, as a doctor, to say it does matter to your health to be happy. It may be the most important health factor in your life.” His says compassionate care of patients relies on humor and play, which he sees as essential to physical and emotional health.
When we laugh heartily, changes occur in many parts of the body, even the arm, leg and trunk muscles. It stimulates the â€˜feel goodâ€™ chemicals in the brain, so you want to repeat it over and over again.
Laughter is the physiological respoÂnse to humor, so although they are similar they are not actually the same. Laughter consists of two parts – a set of gestures and the production of a sound. When we laugh, the brain pressures us to conduct both those activities simultaneously.
As we have learned from previous studies, social interaction strengthens the connections in the brain, and laughter strengthens social connections. Humor researcher Peter Derks describes laughter response as “a really quick, automatic type of behavior.” “In fact, how quickly our brain recognizes the incongruity that lies at the heart of most humor and attaches an abstract meaning to it determines whether we laugh,” he says.
Derks has traced the pattern of brainwave activity in subjects hooked up to an electroencephalograph (EEG) and responding to humorous material. Their brain activity was measured when they laughed. In each case, the brain produced a regular electrical pattern. Within four-tenths of a second of exposure to something potentially funny, an electrical wave moved through the cerebral cortex, the largest part of the brain. If the wave took a negative charge, laughter resulted. If it maintained a positive charge, no response was given, researchers said.
During the experiment, researchers observed the following specific activities:
- Words and structure of the joke took place on the left side of the cortex (the layer of cells that covers the entire surface of the forebrain).
- The frontal lobe of the brain, involved in social emotional responses, became very active.
- In order to â€œget the jokeâ€ the right hemisphere of the cortex carries out the intellectual analysis.
- Brainwave activity spreads to the sensory processing area of the occipital lobe (the area on the back of the head that contains the cells that process visual signals).
- Physical responses to the joke stimulate the motor sections of the brain.
Emotional responses seem to be confined to specific areas of the brain, while laughter appear to be produced via a circuit that runs through many regions of the brain. Damage to any of these regions could impair one’s sense of humor and response to humor, experts say.
Readerâ€™s Digest â€“ I Am Moeâ€™s Funny Bone, September 2005, pg. 92
Science â€“ How laughter works: http://science.howstuffworks.com/environmental/life/human-biology/laughter3.htm