Following is a summary of his research, taken from an interview published in the September/October 1996 issue of the Humor and Health Journal.
Laughter Activates the Immune System
In Berk's study, the physiological response produced by belly laughter was opposite of what is seen in classical stress, supporting the conclusion that mirthful laughter is a eustress state -- a state that produces healthy or positive emotions.
Research results indicate that, after exposure to humor, there is a general increase in activity within the immune system, including: An increase in the number and activity level of natural killer cells that attack viral infected cells and some types of cancer and tumor cells.
An increase in activated T cells (T lymphocytes). There are many T cells that await activation. Laughter appears to tell the immune system to "turn it up a notch."
An increase in the antibody IgA (immunoglobulin A), which fights upper respiratory tract insults and infections.
An increase in gamma interferon, which tells various components of the immune system to "turn on."
An increase in IgB, the immunoglobulin produced in the greatest quantity in body, as well as an increase in Complement 3, which helps antibodies to pierce dysfunctional or infected cells. The increase in both substances was not only present while subjects watched a humor video; there also was a lingering effect that continued to show increased levels the next day.
Peace, Profit and Multiple Orgasms
