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Basically there's these pieces of flesh that start from the nose and wrap down and slightly across the cheek. An example from our favorite world leader is in order (area I'm talking about is highlighted)
But when looking at facial muscle diagrams, that element is nowhere to be found:
I'm just wondering, is this a muscle? Is it a flap of skin? Are there any guides about how it acts with the face?
Thanks for looking.
It's called the naso-labial fold, it's skin. It helps to show the effects of muscles acting on it. A good rule to memorize is that facial wrinkles form perpendicular to the pull of muscles acting on them. These wrinkles help show smiling and sneering, caused by the zygomatic(smiling) muscles, and whatever the sneering muscle's called. It's also useful to show age, on young folks it's nearly invisble.
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