laughter

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The activity of laughing; the manifestation of mirth or joy, or, less commonly, sarcasm or scorn
Alternative medicine See Laughter club, Laughter therapy, Laughter yoga
Neurology Spasmodic and largely involuntary expirations often accompanied by inarticulate vocalisations, generally evoked by mirth
Physiology Laughter increases blood flow to the brain and activates neural networks—e.g., nucleus accumbens (NAcc) and amygdala. Functional MRI data suggests that the increase in blood flow to NAcc evoked by extreme humour is similar to that triggered by monetary gain or use of some addictive drugs; a key symptom of depression is the lack of a sense of reward from previously rewarding activities—e.g., humour
Psychiatry Laughter is regarded as the most effective coping skill for anxiety-panic disorders and may temporarily alleviate the symptoms of anxiety and depression

laughter

(laf′tĕr)
A series of inarticulate sounds produced as an expression of emotion, usually happiness or mirth. The role of humor and laughter in promoting a positive attitude and health and in preventing the progress of some diseases has been documented esp. when it is combined with proven medical therapies.

compulsive laughter

Laughter without cause, occurring in certain psychoses, esp. schizophrenia.

pathological laughter

Uncontrolled laughter (occasionally accompanied by, or alternating with, uncontrolled crying), caused by pseudobulbar lesions of the brain. These lesions may result from lacunar strokes, multiple sclerosis, anoxic brain injury, and other forms of brain injury.
References in periodicals archive ?
The Chuckle Brothers, Barry (left) and Paul Elliott, arrive at Southwark Crown Court in London yesterday Yui Mok
He was last spotted at the Chuckle Club in December last year.
Chuckle Monster's strapline is 'send some happiness', and we promise to live up to that: choosing a card for someone should be a joy rather than a chore, and we will provide the best card-buying experience yet," said Chris Tapp, MD of Chuckle Monster.
Throw in some chuckle as they swing overhead--not the rolling rattlesnake chuckle heard in a contest, but broken bits "tuck-a, tuck-a, tuck-a.
The historic event also marks the launch of Chuckle with Chewits -
Expect a fun-filled family show and more than a chuckle or two as the brother's slapstick brand of comedy takes to the stage.
And on February 20 The Chuckle Brothers present their hilarious new show - A 2014 Space Oddity.
The woman has previously told the court her ordeal ended when they were interrupted by one of the Chuckle Brothers walking past in the corridor.
The woman said her ordeal only ended when children's comedy favourites the Chuckle Brothers walked past and one called out: "All right, Dave?
A former stage hand who was allegedly groped by veteran DJ Dave Lee Travis while he was appearing in a pantomime has told a court her ordeal ended when they were interrupted by children's entertainers the Chuckle Brothers.
CHUCKLE Club in Bahrain will mark its first anniversary next month.