WHY DO WE LAUGH WHEN
TICKELED
Tickling affects the same
unmyelinated nerve fibre that carries
pain signals, and our
most ticklish parts are
vulnerable spots, such
as our
neck, abdomen and armpits.
Laughing for joy
amusement and tickling
all activate brain areas controlling facial and
vocal reactions, but only
tickling activates the hypothalamus, which is an area that
anticipates pain. It’s possible that tickling is interpreted as a threat and
the laughter is a social signal of submission to prevent us from
getting hurt or
to defuse a
scary situation.
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