Orbicularis oris

The orbicularis orisSphincter / Closes lips Surrounds your mouth, allowing you to pucker or close your lips. is located around the mouthThe opening of the digestive tract where food enters and mastication begins.. It can be referred to as the “kissing muscle.” This is due to its role in puckering the lips.

Orbicularis oris Origin

The orbicularis oris does not have a traditional origin and insertion like other muscles, as it is a circular muscle. Instead, it is composed of fibers that originate from various points around the mouth. These fibers primarily come from the maxillaUpper jaw bones; form upper teeth sockets, hard palate front, and parts of the nose and orbit. (upper jaw) and mandibleLower jawbone; only movable bone of the skull; U-shaped and largest facial bone. (lower jaw). They also originate from other muscles surrounding the mouth, such as the buccinatorCheek muscle In your cheek wall; helps blow air and keep food between teeth. and zygomaticus muscles.

Orbicularis oris Insertion

The muscle fibers of the orbicularis oris interlace and insert into the skinThe body’s largest organ, providing protection and regulation. and mucous membrane of the lips. This arrangement allows the muscle to control the movementA fundamental property of life involving motion of the body or its parts. of the lips in various directions and shapes. It makes the muscle highly versatile. It is integral to many facial expressions and oral functions.

Orbicularis oris Actions

Facial Expression and Emotional Communication

Speech Articulation

Puckering and Closing the Lips