Where do dimples come from?
Dimples can occur in many places on the body, including lower back, cheeks or chin. Have you ever wondered why some people have dimples (and sometimes just one) and others don’t?
Cheek dimples are only present in just over 35% of the population and they are caused by the muscle that is responsible for lifting the corners of our mouth into a smile: the zygomaticus major muscle. The zygomaticus major muscle is one of the muscles of facial expression and connects the zygomatic bone (cheek bone) to the skin at the corner of the mouth. Everyone has this muscle, but in the majority of the population, this muscle is smooth and has just one major “belly” of the muscle contributing to movement of the overlying skin.
In the minority of the population, this muscle splits. When a muscle splits, it is a variation of normal and is called a “bifid muscle.” The splitting of this muscle into two separate bellies means that the overlying skin will show a concavity, the dimple. Some people believe that dimples are a genetic anomaly, which could still be true; however, more research is needed to confirm this as fact.
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