Ticklish Rats Laugh and Jump for Joy

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(1)
(a) Ishiyama S and Brecht M, Neural Correlates of Ticklishness in the Rat Somatosensory Cortex. Science, 354: 757-760 (Nov 11, 2016)
http://science.sciencemag.org/content/354/6313/757
(full text available for free)

(b) Emily Underwood, Watch These Ticklish Rats Laugh and Jump for Joy. Science, Nov 10, 2016.
www.sciencemag.org/news/2016/11/ ... -laugh-and-jump-joy

Note: "Best of all, rats display a classic expression of positive emotion, found across many species, including dogs, foxes, lambs, guinea pigs, and human children, called 'joy jumps,' Ishiyama says. This involves leaping into the air with both legs together, he explains."

Search images.google.com (but not youtube.com, which has nothing) with ("joy jump" tickle animals).


(2) James Gorman, When Tickled, Rats Giggle and Leap, Researchers Find. New York Times, Nov 12, 2016 (video).