NCIt definition : Paired muscles on both sides of the face (Zygomaticus major and Zygomaticus minor)
extending from the zygomatic bone to the corners of the mouth/upper lip; primary function
is to draw the lip superiorly, posteriorly and laterally.;
Alternative definition : CDISC: A muscle extending from the zygomatic bone to the corners of the mouth/upper
lip; primary function is to draw the lip superiorly, posteriorly and laterally.;