How to Spot a Fake Smile

482 Words2 Pages
How many times a day do you smile? Out of those, how many times do you really mean it? Try keeping track—you might be surprised! People do smile when they're genuinely happy, but the truth is, humans also smile for a lot of other reasons—most of them are social. For example, maybe you've just been introduced to your best friend's cousin, Mark. What do you do? Smile and say hello! But are you really happy to meet him? Probably not; instead you're smiling to be polite and welcoming. On the other hand, if someone introduced you to your favorite movie star—well then you'd be grinning out of sheer delight! How easy is it to spot a genuine smile—one that happens spontaneously because the person is feeling happy—from one that is made on purpose, for social reasons? Do you think you're good at telling the difference between genuine (real) and fake smiles? Before reading any further, try this 10-minute online Spot the Fake Smile test to find out just how talented you are at discerning between genuine and fake smiles. So, how did you do? Are you surprised? Biologists and psychologists have spent many research hours working to understand how and when different facial expressions are made, and how others interpret those expressions. By observing people who've had strokes or other brain injuries, scientists have learned that there are two parts of the brain that control smiling. The motor cortex controls voluntary motions of the face (that is, motions done consciously and on purpose). When a person wants to smile for social reasons, he or she uses the motor cortex of their brain to do so. But spontaneous, emotionally driven smiles are triggered by a totally different part of the brain: the cingulate cortex. So, as long as the cingulate cortex wasn't damaged, a person who has had a stroke that affects his or her motor cortex can still grin at a good joke if he or she truly
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