1+2+4: levantamiento de la ceja interior + levantamiento de la ceja exterior + descenso de la ceja
frontalis, pars medialis + frontalis, pars lateralis + [corrugator supercilii, depressor supercilii, depressor glabellae (aka procerus)] – blendshape – blendshapes – blend shape – blend shapes – FACS – Facial Action Coding System