Arteria labialis inferior

Arteria Labialis Inferior is a branch of the Facial Artery that supplies blood to the lower lip. It is also known as the Inferior Labial Artery.

Anatomy

The Arteria Labialis Inferior arises near the angle of the mouth. It passes upward and forward, beneath the Triangularis muscle and then beneath the Depressor labii inferioris muscle. It runs along the edge of the lower lip between the Mucous membrane and the Orbicularis oris muscle, supplying them with blood. It also supplies blood to the nearby Glands and Skin.

Clinical Significance

Due to its location and function, the Arteria Labialis Inferior can be involved in several medical conditions. These include Lip cancer, Oral cancer, and Facial trauma. In these cases, the artery may need to be ligated, or tied off, to prevent excessive bleeding.

See Also

• Facial Artery
• Orbicularis oris muscle
• Depressor labii inferioris muscle
• Triangularis muscle

References

• Gray's Anatomy: The Anatomical Basis of Clinical Practice, 41st Edition
• Moore, Keith L.; Dalley, Arthur F.; Agur, Anne M. R. (2013). Clinically Oriented Anatomy, 7th Edition