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