Why… doesn’t it tickle when you tickle your­self?

The Week - Junior - - Science And Technology -

Sci­en­tists aren’t com­pletely sure what makes some­one tick­lish. One the­ory is that be­ing tick­lish is a de­fence mech­a­nism that pro­tects parts of your body. An­other the­ory is that tick­ling en­cour­ages so­cial bond­ing with other peo­ple. What sci­en­tists do know is that be­ing tick­led stim­u­lates a part of your brain called the hy­po­thal­a­mus, which is the area that con­trols emo­tions. This causes your body to have an emo­tional re­sponse, such as laugh­ing out loud.

The rea­son you can’t tickle your­self is be­cause your brain knows it is go­ing to hap­pen, so it can­cels the re­sponse your body might nor­mally have when an­other per­son tick­les you.

Name: Aran

Year: 6

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