The depressor septi nasi pulls the nose inferiorly, so assisting the alar part of the nasalis in opening the nares.
The muscles in the oral group move the lips and cheek. They include the orbicularis oris and buccinator muscles, and a lower and upper group of muscles (Fig. 8.59). Many of these muscles intersect just lateral to the corner of the mouth on each side at a structure termed the modiolus.