The labial part constitutes the main body of the orbicularis oris, responsible for lip closure and compression. It receives contributions from the buccinator and other perioral muscles that decussate at the modiolus.
| Origin | Modiolus and perioral facial muscles — receiving fibres from buccinator, zygomaticus, and other perioral muscles |
|---|---|
| Insertion | Central dermis of the lip — blending with skin across the lip body |
| Nerve Supply | Facial nerve — buccal branches (VII) |
| Blood Supply | Superior and inferior labial arteries |
| Actions | Closes the lips; Protrudes the lips; Compresses the lips against the teeth |
|---|
The labial part is the component addressed in orbicularis oris reconstruction after cancer ablation. Perioral botulinum injection for smoker's lines targets the labial part superficially to reduce perioral vertical wrinkles. In total lip reconstruction, the orbicularis oris muscle must be re-created using adjacent muscle transfers.
Palpated as the main lip body muscle during lip compression.
Segmental lip resection including the labial orbicularis producing a functional deficit requiring orbicularis reconstruction with cross-lip Abbe flap or other local flap to restore oral competence.
This website uses cookies to enhance your experience. Some are essential for site functionality, while others help us analyze and improve your usage experience. Please review your options and make your choice.
If you are under 16 years old, please ensure that you have received consent from your parent or guardian for any non-essential cookies.
Your privacy is important to us. You can adjust your cookie settings at any time. For more information about how we use data, please read our privacy policy. You may change your preferences at any time by clicking on the settings button below.
Note that if you choose to disable some types of cookies, it may impact your experience of the site and the services we are able to offer.
Some required resources have been blocked, which can affect third-party services and may cause the site to not function properly.
This website uses cookies to enhance your browsing experience and ensure the site functions properly. By continuing to use this site, you acknowledge and accept our use of cookies.
