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» » Teaching the meaning of facial expressions

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The focus is human anatomy: A long time ago I heard the adage that it takes something like 43 muscles to frown but only 17 muscles to smile, ergo, we should just smile because it's easier. It wasn't until my first anatomy class in college that I realized these numbers couldn't possibly be right. As far as I can tell, there are only about 36 named muscles of facial expression, and they're not all involved in smiling and frowning. Here they are in alphabetical order a "2" in parentheses means the muscle is bilateral, "1" means it's unpaired:

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