Laughter is an audible expression or the appearance of happiness, or an inward feeling of joy. We can hear it every day in our environment. Laughter is universal. it has nothing to do with what language we speak, which culture we were raised in, or what our religious faith is. We all laugh. The study of humor and laughter, and its psychological and physiological effects on the human body, is called gelotology.
First of all, scientists argue that laughter probably is genetic. Also, they found that infant start laughting at about four months of age. A very rare neurological condition has been observed whereby the sufferer is unable to laugh out loud, a condition known as aphonogelia.
Secondly, here is five different types of laughter. One of them is etiquette laughter - starts with a smile and it can be quite restrained and easily managed. One more is pigeon laughter - requires you to take a deep inhalation with the mouth shut and produce laughing sounds like the hum of a pigeon. Nervous laughter - during times of stress and anxiety, we often laugh in a subconscious attempt to reduce stress and calm down. Silent or soundless laughter - inhale gently through the nose with mouth closed. The last one is belly laughter - when you open your mouth, you let go and laugh loudly.
Thirdly, common reasons for laughter are sensations of joy and humor. But it is not the only one reason. Sigmund Freud summarized it in his theory that laughter releases tension and "psychic energy". This theory is one of the justifications of the beliefs that laughter is beneficial for one's health.
Moreover, laughter releasis stress, has a direct influence on certain hormone secretion of our body, helps to immune system, can improve memory condition. On the other hand, the joyous discovery that ten minutes of genuine belly laughter had an anesthetic effect and would give us at least two hours of pain-free sleep.
Furthermore, There is well documented and ongoing research in laughter therapy. A client's laughter triggers are identified such as people in their lives that make them laugh, things from childhood, situations, movies, jokes, comedians, basically anything that makes them laugh. Based on the information provided by the client, the clinician creates a personal humor profile to aid in the laughter therapy. In this one on one setting, the client is taught basic exercises that can be practiced. The intent of the exercises is to remind the importance of relationships and social support. It is important the clinician is sensitive to what the client perceives as humorous.
To sum up, laughter is an expression of amusement. People who are 'up' positive personalities and laugh a lot generally have less physical problems than those who are depressed. Laughter therapy boosts the interferon levels of the immune system which helps the system's ability to fight illness and escalates healing. Laughter decreases stress hormones that constrict blood vessels and suppress immune activity.
Refferences:
http://health.howstuffworks.com/human-nature/emotions/happiness/science/5-types-of-laughter.htm
http://www.foxnews.com/story/0,2933,189755,00.html
http://changingminds.org/techniques/humor/laughter.htm
http://en.wikipedia.org/wiki/Laughter
http://empower-you.blogspot.com/2008/07/do-you-know-types-of-laughter.html
http://www.psychologytoday.com/articles/200011/the-science-laughter
http://hubpages.com/hub/Whats-So-Funny-The-Psychology-Behind-Jokes-and-Laughter
http://www.punyajokes.com/laughter_therapy.htm
http://fineartamerica.com/blogs/the-paroxysm-of-laughter.html
http://www.stbotanica.co.uk/magazine/advantages-of-laughter/
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