Depressor anguli oris muscle
|Depressor anguli oris|
|Scheme showing arrangement of fibers of Orbicularis oris. (Triangularis labeled at bottom right.)|
|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|
|Nerve:||mandibular branch of facial nerve|
|Action:||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.
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.
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.