Depressor anguli oris muscle
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|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).
|Origin||Tubercle of mandible|
|Insertion||Modiolus of mouth|
|Nerve||Mandibular branch of facial nerve|
|Actions||Depresses angle of mouth|
|Latin||Musculus depressor anguli oris|
|Anatomical terms of muscle|
The depressor anguli oris arises from the oblique line of the mandible, whence its fibres 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.
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