Nov 3, 2023 · Orbicularis oris is a complex circular muscle that surrounds the orifice of the mouth and forms the majority of the lips. It belongs to a large group of muscles of facial expression called the buccolabial group.

Aug 7, 2023 · Orbicularis oris, function in association with the cheek muscles to create contact between the teeth and lips by pressurizing the dental arches and collaborating in the production of speech sounds. It is also crucial for swallowing, mastication, and sucking.

In human anatomy, the orbicularis oris muscle is a complex of muscles in the lips that encircles the mouth. [2] It is not a true sphincter, as was once thought, as it is actually composed of four independent quadrants that interlace and give only an appearance of circularity. [3]

Jan 16, 2025 · The orbicularis oris muscle is a sphincter muscle that is located in the face and surrounds the mouth. It is a broad, thin muscle that is composed of several fibers that are arranged in a circular pattern.

Sep 18, 2023 · The orbicularis oris muscle, also known as the orbicular muscle of the mouth, (TA: musculus orbicularis oris) is one of the facial muscles and its primary action is as the sphincter of the mouth.

Aug 23, 2024 · The orbicularis oris is an oral muscle of facial expression. It is the main sphincter muscle of the lips. Attachments – Arises from the maxilla and from the other muscles of the cheek. It inserts onto the skin and mucous membrane of the lips. Action – Closes the lips to narrow the oral opening. Innervation – Buccal branches of the facial ...

The orbicularis oris muscle is an annular muscle consisting of an outer marginal part and an inner labial part. The marginal part of the orbicularis oris muscle arises from the labial sides of the modiolus of angulus oris.

The orbicularis oris muscle (OOM) consists of a superficial and a deep portion. The deep layer has the shape of a hockey stick with two parts: Pars marginalis (PM) and Pars peripheralis (PP). The PM is lo-cated in the curvature of the red portion, the PP is located mainly in the white por-tion of the lip. The superficial portion con-

The orbicularis oris (Latin: musculus orbicularis oris) is a circular-shaped facial muscle that is located around the mouth. It is classified as the buccolabial facial muscle. The orbicularis oris is composed of two main parts, named the marginal (smaller) and peripheral parts (larger).

The orbicularis oris muscle pulls the lip tissue in centrally and will invert the lip. This muscles assist in eating, drinking, not drooling, whistling and kissing. Whether the patient smokes or not, the pesky little barcode lines above the upper lip can become a nuisance for the patients.