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Neuroplasticity is the process by which neurons adapt to a disturbance over time, and most often occurs in response to repeated exposure to stimuli. [27] Aerobic exercise increases the production of neurotrophic factors [note 1] (e.g., BDNF, IGF-1, VEGF) which mediate improvements in cognitive functions and various forms of memory by promoting blood vessel formation in the brain, adult ...
[citation needed] Because laughter is a social mechanism, an audience may not feel as if they are in danger, and the laugh may not occur. In addition, the extent of the inconsistency (and aspects of its timing and rhythm) has to do with the amount of danger the audience feels, and how hard or long they laugh.
Gelotology (from the Greek γέλως gelos "laughter") [1] is the study of laughter and its effects on the body, from a psychological and physiological perspective. Its proponents often advocate induction of laughter on therapeutic grounds in alternative medicine. The field of study was pioneered by William F. Fry of Stanford University. [2]
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Endorphins (contracted from endogenous morphine) [1] [2] [3] are peptides produced in the brain that block the perception of pain and increase feelings of wellbeing. They are produced and stored in the pituitary gland of the brain.
Relief theory suggests humor is a mechanism for pent-up emotions or tension through emotional relief. In this theory, laughter serves as a homeostatic mechanism by which psychological stress is reduced [1] [3] [7] Humor may thus facilitate ease of the tension caused by one's fears, for example.
Paradoxical laughter is an exaggerated expression of humour which is unwarranted by external events. It may be uncontrollable laughter which may be recognised as inappropriate by the person involved. It is associated with mental illness, such as mania, hypomania or schizophrenia, schizotypal personality disorder and can have other causes.
Laughter causes the body's muscles to relax which increases blood flow and oxygen intake. [27] Proposed benefits include: Stress management, [28] relaxation, improved mental functions, improved digestion, and pain relief. Some suggest that laughter activates similar brain wave frequencies as a meditative state. [29]