| Depressor anguli oris | |
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| Scheme showing arrangement of fibers of Orbicularis oris. (Triangularis labeled at bottom right.) | |
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| Muscles of the head, face, and neck. (Labeled as triangularis near chin.) | |
| Latin | musculus depressor anguli oris |
| Gray's | subject #108 383 |
| Origin | tubercle of mandible |
| Insertion | modiolus of mouth |
| Artery | facial artery |
| Nerve | mandibular branch of facial nerve |
| Actions | depresses angle of mouth |
The Depressor anguli oris (Triangularis) arises from the oblique line of the mandible, whence its fibers converge, to be inserted, by a narrow fasciculus, into the angle of the mouth.
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Anatomy
At its origin it is continuous with the Platysma, and at its insertion with the Orbicularis oris and Risorius; some of its fibers are directly continuous with those of the Caninus, and others are occasionally found crossing from the muscle of one side to that of the other; these latter fibers constitute the Transversus menti.
Function
It is a muscle of facial expression associated with frowning.
See also
Additional images
 Mandible. Outer surface. Side view. |
 The arteries of the face and scalp. |
External links
- LUC dao
- -684392371 at GPnotebook
- depressor+anguli+oris+muscle at eMedicine Dictionary
- PTCentral
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.
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