The (Depressor anguli oris) 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 .
It is a
Muscle of
Facial Expression associated with
Frowning .
