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 zygomaticus minor is a muscle of facial expression. It originates from malar bone and continues with orbicularis oculi on the lateral face of the Levator labii superioris and then inserts into the outer part of the upper lip. Do not confuse this with the Zygomaticus major, which insets into the angle of the mouth. It draws the upper lip backward, upward, and outward (used in making sad facial expressions). Like all muscles of facial expression, it is innervated by the facial nerve (CN VII). The zygomaticus minor is sometimes referred to as the zygomatic head of the Levator labii superioris muscle.