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Modiolus of Anuglus Oris
Muscular System

Modiolus of Anuglus Oris

Modiolus anguli oris

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The modiolus of angulus oris is a fibromuscular region of the orbicularis oris that sits lateral to the angles of the mouth (i.e., the border between the upper and lower lips) (Standring, 2016).

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Anatomical Relations

The modiolus of angulus oris receives innervation from the buccal and mandibular marginal branches of the facial nerve (CN VII). It receives its arterial supply from the superior and inferior labial arteries.


The modiolus of angulus oris is the site of insertion for several muscles of facial expression, including the buccinator, zygomaticus major, levator anguli oris, depressor anguli oris, orbicularis oris, and risorius. This arrangement allows these muscles to integrate the movements of the cheeks, lips, oral fissure and cavity, and jaws.

List of Clinical Correlates

- Bell’s palsy


Standring, S. (2016) Gray's Anatomy: The Anatomical Basis of Clinical Practice. Gray's Anatomy Series 41st edn.: Elsevier Limited.

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