Depressor anguli oris :-
Muscle details :-
The depressor anguli oris (triangularis) is a facial muscle associated with frowning.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.
it is continuous with the platysma . tubercal of the mandible .
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
Nerve supply :-
Mandibular branch of facial nerve (VII) .
The depressor anguli oris is a muscle of facial expression. The muscle depresses the corner of the mouth which is associated with frowning.
Related pathology :-
In Bell’s palsy depressor anguli oris muscle commonly paralysis .