the group of muscles, innervated by the facial nerve, which initiates the motion of the upper lip upward, backward, and outward. Its activity is documented in analyses of feeling.

ZYGOMATICUS: "Tomorrow, we will be covering the section in your textbook supplement on zygomaticus."
Cite this page: N., Pam M.S., "ZYGOMATICUS," in PsychologyDictionary.org, April 29, 2013, https://psychologydictionary.org/zygomaticus/ (accessed January 19, 2021).