Depressor Anguli Oris Muscle Laterally
Musculus depressor anguli oris is the Latin pronunciation for Depressor Anguli Oris Muscle. Depressor Anguli Oris is also known as Triangularis is a Facial Muscle in association with Frowning (eyebrows brought together and forehead wrinkled).
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Depressor Anguli Oris Muscle Laterally
Depressor Anguli Oris Muscle originates from the line of the Mandible (Lower Jaw). At the point of its origin it is in continuation with Platysma (superficial muscle overlapping muscle of neck). Some of the fibers are continuous with the fibers of Caninus. It ends at the Orbicularis Oris Muscle a Sphincter muscle (circular muscle) of the Lips.
The Depressor Anguli Oris Muscle receives innervations from the Mandibular branch of Facial Nerve, Cranial Nerve VII.
The blood to the muscle is supplied by the Inferior Labial branch of Facial Artery.
Depressor Anguli Oris Muscle is the muscle for Facial expressions. The muscles functions by depressing the corner of the mouth which results in frowning.
Depressor Anguli Oris Muscle sometimes doesn’t develop during the pregnancy and the child is born without it. It is visible as a facial asymmetry when the baby is crying. The side of the face missing the muscle will be displaced to the normal side. Perpetual Frown in some people is removed by injecting small amount of Botox.
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CLINICAL SIGNIFICANCE
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