Depressor anguli oris muscle

Depressor anguli oris muscle
Depressor anguli oris
Gray381.png
Scheme showing arrangement of fibers of Orbicularis oris. (Triangularis labeled at bottom right.)
Depressor anguli oris.png
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 fibres converge, to be inserted, by a narrow fasciculus, into the angle of the mouth.

Contents

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


External links

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 As such, some of the information contained within it may be outdated.


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