Laughter is an audible expression or appearance of happiness Happiness is a state of mind or feeling characterized by contentment, love, satisfaction, pleasure, or joy. A variety of philosophical, religious, psychological and biological approaches have striven to define happiness and identify its sources, or an inward feeling of joy (laughing on the inside). It may ensue (as a physiological Physiology is the science of the functioning of living systems. It is a subcategory of biology. In physiology, the scientific method is applied to determine how organisms, organ systems, organs, cells and biomolecules carry out the chemical or physical function that they have in a living system. The word physiology is from Greek φύσις, physis, reaction) from jokes A joke is a short story or ironic depiction of a situation communicated with the intent of being humorous. These jokes will normally have a punchline that will end the sentence to make it humorous. A joke can also be a single phrase or statement that employs sarcasm. The word joke can also be used as a slang term for a person or thing which is not, tickling Tickling is touching a part of the body , so as to cause involuntary twitching movements or laughter. Such sensations can be pleasurable or exciting, but are sometimes considered highly unpleasant, particularly in the case of relentless heavy tickling, and other stimuli. Strong laughter can sometimes bring an onset of tears Tears are the liquid product of a process of crying to clean and lubricate the eyes. The word lacrimation (also spelled lachrymation) may also be used in a medical or literary sense to refer to crying. Strong emotions, such as sorrow or elation, may lead to crying. The process of yawning may also result in lacrimation. Although most land mammals or even moderate muscular pain.
Laughter is found among various animals Laughter in animals other than humans describe animal behavior which resembles human laughter, as well as in humans. Among the human species, it is a part of human behaviour Human behavior is the collection of behaviors exhibited by human beings and influenced by culture, attitudes, emotions, values, ethics, authority, rapport, hypnosis, persuasion, coercion and/or genetics regulated by the brain The brain is the center of the nervous system in all vertebrate, and most invertebrate, animals. Some primitive animals such as jellyfish and starfish have a decentralized nervous system without a brain, while sponges lack any nervous system at all. In vertebrates, the brain is located in the head, protected by the skull and close to the primary, helping humans clarify their intentions in social interaction In sociology and anthropology, a social relation or social interaction refers to a relationship between two , three (i.e. a triad) or more individuals (e.g. a social group). Social relations, derived from individual agency, form the basis of the social structure. To this extent social relations are always the basic object of analysis for social and providing an emotional context to conversations. Laughter is used as a signal for being part of a group — it signals acceptance and positive interactions with others. Laughter is sometimes seemingly contagious, and the laughter of one person can itself provoke laughter from others as a positive feedback Positive feedback, sometimes referred to as "cumulative causation", refers to a situation where some effect causes more of itself. A system undergoing positive feedback is unstable, that is, it will tend to spiral out of control as the effect amplifies itself.[1] This may account in part for the popularity of laugh tracks A laugh track, laughter soundtrack, laughter track, LFN , canned laughter or a laughing audience is a separate soundtrack invented by Charles "Charley" Douglass, with the artificial sound of audience laughter, made to be inserted into TV comedy shows and sitcoms. The first American television show to incorporate a laugh track was the in situation comedy A situation comedy, usually referred to as a sitcom, is a genre of comedy programs which originated in radio. Today, sitcoms are found almost exclusively on television as one of its dominant narrative forms. Sitcoms usually consist of recurring characters in a common environment such as a home or workplace and can include laugh tracks or studio television shows.
Scientifically speaking, laughter is caused by the epiglottis constricting the larynx, causing respiratory upset. The study of humor and laughter, and its psychological and physiological effects on the human body is called gelotology Gelotology is the study of laughing and laughter, its effects on the human body, and of medical abnormalities of laughing. It is also the psychological and physiological study of laughter. The word is from the Greek gelos, geloto meaning laugh, laughter, laughing . The word gelotology is often misspelled as gelatology.
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( Laughter .) John is going to be outstanding. And Don Cunningham, Lehigh County Executive. (Applause.) So it's been about a year and a half since I last ...
Obama fields bold questions as he hits the road in jobs crusade Los Angeles Times
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