Why You Can't Tickle Yourself

Try to tickle yourself right now. You can't. Nobody can. You are the one person on Earth who is completely immune to your own hands, and the reason why is one of the strangest things your brain does every second of your life. This is the science of why you can't tickle yourself, the lab experiment that proves you can trick your brain into doing it anyway, the people who can tickle themselves and what it reveals, and the unsettling truth it points to: you have never actually felt the raw world, only your brain's edited best guess of it. Covers knismesis vs gargalesis (the two types of tickle), the cerebellum's prediction system and the efference copy, the Blakemore robot-arm delay experiment, the link between self-tickling and schizophrenia, why tickling makes you laugh (still an open question), rats giggling at 50 kHz, and how your brain cancels self-generated sensation across every sense. In This Video: 0:00 Go On, Try It 1:40 The Two Tickles 3:06 The Spy In Your Head 4:47 How To Tickle Yourself Anyway 6:04 The People Who Can 7:26 Why You Even Laugh 8:52 The Rats Are Laughing Too 10:00 You Have Never Felt Anything #Tickling #BrainFacts #Neuroscience #HumanBody #WhyYouCant