The neuroscience of tickling: Why are we so ticklish?

Tickling has puzzled people for centuries, prompting questions such as why certain touches make us laugh or squirm. Recent neuroscience research offers intriguing insights into the brain's response to tickling, suggesting that the phenomenon is more than just a playful annoyance. What is ticklish? Tickling actually refers to two different sensations. The first is a light touch to the skin, similar to the sensation of hair touching the neck or feathers gliding down the hand. This is called knizmesis, a mild itchy sensation that may make you want to brush away the source or scratch the area. Knismesis is not usually laughable; it's more like an itch. The second type of tickling, known as gargalesis, is more intense and usually causes laughter and squirming. Gargalosis occurs when someone constantly presses on certain sensitive areas of your body, such as your ribs or armpits. This type of tickling can be both pleasurable and irritating, and it is this sensation that has been the ...