Humans are under certain biological constraints, which is why we can express happiness and joy only by activating musculuszygomaticusmajor.
From theCambridge English Corpus
Specifically, the presence of a double or bifidzygomaticusmajor muscle may explain the formation of cheek dimples.
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Anatomically, dimples may be caused by variations in the structure of the facial muscle known aszygomaticusmajor.
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Dimples may be caused by variations in the structure of the facial muscle known aszygomaticusmajor.
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Four such muscles that were activated were the orbicularis oculi,zygomaticus, the corrugator, and levator.
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Sometimes fibers can be traced to thezygomaticus, or to the margin of the orbicularis oris.
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Zygomaticusmajor shown in red.
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