In January 1962, three schoolgirls at a mission boarding school near Lake Victoria in what was then called Tanganyika began ...

It starts calmly - and then everything breaks. This moment captures reactions that spiral into uncontrollable laughter. No ...

Scientists mapped two hidden laughter networks in the brain, revealing why spontaneous laughter cannot be faked and may even help ease pain.

Two sets of published diagnostic criteria are available to help differentiate PBA from depression. The first set of diagnostic criteria was developed by Poeck in 1969. 3 These 4 criteria include: ...

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The symptoms: The woman visited a clinic because she had long experienced bursts of uncontrollable laughter, which doctors described as "mirthless" in a report of her case. According to the patient, ...

Think about all the times you’ve laughed with your friends: the late-night giggles, the completely ridiculous inside jokes, or the perfectly timed sarcastic comment that left you and your friends ...