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.
1. Hyperventilation. Hyperventilation is one of the causes of numbness in lips, which is caused due to anxiety and stress. When a person is hyperventilating he inhales and exhales in rapid succession, thus causing a shortage of carbon dioxide in his blood. This loss further results in more anxiety.