Depressor anguli oris muscle
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.
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
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Image:Gray176.png|Mandible. Outer surface. Side view.
Image:Gray508.png|The arteries of the face and scalp.
</gallery>
External links
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