Novel Classifications for Muscular Contraction of the Lower Face and Neck.

Background: Currently, there are no scales that address lower-face muscular contraction patterns, and there is only one that addresses platysmal bands.

Objective: The goal of this article is to create scales to classify the strength and contraction patterns of the lower face and neck based on (1) the muscular anatomy and contraction patterns of the platysma and (2) the strength of the depressor anguli oris (DAO).

Methods: Three hundred sixty patients participated in the study.