zygomaticus major muscle

(redirected from Zygomatic major muscle)

zy·go·mat·i·cus ma·jor mus·cle

(zī'gō-mat'i-kŭs mā'jŏr mŭs'ĕl)
Facial muscle of anterior cheek extending to upper lip; origin, zygomatic bone anterior to temporozygomatic suture; insertion, muscles at angle of mouth; action, draws upper lip upward and laterally; nerve supply, facial.
Synonym(s): musculus zygomaticus major [TA] , greater zygomatic muscle, musculus zygomaticus.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
When you flex your "smile muscles" (like the zygomatic major muscle which is required to smile) your brain interprets this as, "I must be happy." When the muscles are not flexed, your brain thinks, "I must not be that happy."
For example, "to laugh" resulted in activation of the zygomatic major muscle, but did not cause any response in the muscles responsible for frowning.