Customer Support. Busey Holidays Observed New Year's Eve all facilities close at 5 p.m. New Year's Day all facilities closed Martin Luther King Day customer support available 8 a.m. - 1 p.m. CST Presidents' Day customer support available 8 a.m. - 1 p.m.
Orbicularis oris muscle. In human anatomy, the orbicularis oris muscle is a complex of muscles in the lips that encircles the mouth. Until recently, it was misinterpreted as a sphincter, or circular muscle, but it is actually composed of four independent quadrants that interlace and give only an appearance of circularity.
The lips are a highly visible facial structure used in speech articulation, food consumption, and tactile sensation. Because of their prominent location on the face, lacerations of the lips can be cosmetically deforming. See the images below. Lip laceration involving the lower vermilion border.