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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.
Orbicularis oris. Located in the face, the orbicularis oris muscle controls movements of the mouth and lips. Specifically, it encircles the mouth, originating in the maxilla (upper jaw and palate) and mandible (lower jaw) bones.The muscle inserts directly into the lips.In common language, the orbicularis oris is often referred to as the kissing muscle..It allows for facial expression, and more specifically, it is responsible for puckering the lips. While this action is a requirement for kissing, the puckering action is used in a number of other ways.pecifically, it encircles the mouth, originating in the maxilla (upper jaw and palate) and mandible (lower jaw) bones. The muscle inserts directly into the lips. In common language, the orbicularis oris is often referred to as the kissing muscle..