There is extensive research on laughter publically available showing vast benefits of laughter and the need for making laughter the important part of our daily life. - Therapeutic Benefits of Laughter in Mental Health: A Theoretical Review.  (Yim J. - 2016)  - Neuroendocrine and stress hormone changes during mirthful laughter.  (Berk LS, Tan SA, Fry WF, Napier BJ, Lee JW, Hubbard RW, Lewis JE, Eby WC - 1989) - The dynamics of laughter. (Davidhizar R, Bowen M -  1992) - Social laughter releases endorphins in the brain.  (University of Turku 2017) - The social life of laughter.  (Sophie Scott, Nadine Lavan, Sinead Chen, Carolyn McGettigan - 2014)  - Play doesn’t end with childhood: why adults need it too - (2014)

( - (Joan M Erikson on The importance of play in adulthood, an interview with Joan M Erikson 1902 - 1997) by Daniel Benveniste - Laughter Prescription (William B Strean - 2009) - Social laughter is correlated with an elevated pain threshold. (Dunbar RI, Baron R, Frangou A, Pearce E, van Leeuwin EJ, Stow J, Partridge G, MacDonald I, van Vogt M - 2012)  -  The therapeutic value of laughter in medicine (Mora-Ripoli R - 2010) - Effects of Laughter Therapy on Anxiety, Stress, Depression and Quality of Life in Cancer Patients (Melike Demir - 2015) - Laughter is the best medicine? A cross-sectional study of cardiovascular disease among older Japanese adults  (Kei Hayashi, Ichiro Kawachi, Tetsuya Ohira, Katsunori Kondo, Kokoro Shirai, Naoki Kondo - 2016) - Study reveals laughter really is the best medicine (2011) - Effect of laughter yoga on mood and heart rate variability in patients awaiting organ transplantation: a pilot study.  (Dolgoff-Kaspar R, Baldwin A, Johnson MS, Edling N, Sethi GK - 2012) - iplayer Radio 4 Sophie Scott on The Life Scientific (2013) - Laughter on the brain: the science behind our sniggers  (Sophie Scott 2012)

Professor Robin Dunbar - Oxford University – 14 Sept 2011 - Research 

( reveals laughter really is the best medicine (2011) - Sophie Scott from University College London (UCL) says laughter is a universally recognised social emotion, and it is physically contagious.       

Learning and Laughter – Sophie Scott

http://www.thechildrensmediaconference.co  - (2014) - LLU researcher finds that anticipating happy times may have health benefits. Lee Berk, DrPH at Loma Linda University professor - Laughter may be the best medicine for age-related memory loss (2014) 

Dr Lee Burk, co-author of the recent study conducted in Loma Linda University, California, suggested that the less stress a person has, the better their memory performance, and humour may be the key to reducing stress levels. 

National Geographic : Is Laughter the Best Medicine?

Link to Professor Robin Dunbar’s paper

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