Modiolus (face)

Modiolus (face)

The modiolus is located near the corner of the mouth.

The modiolus is a chiasma of facial muscles located near the corner of the mouth. It is a pivotal point for the dynamic movements of the lips and cheeks during facial expression, speech, and mastication.

Anatomy

The modiolus is formed by the convergence of several facial muscles, including the orbicularis oris, buccinator, levator anguli oris, depressor anguli oris, zygomaticus major, and zygomaticus minor. These muscles intertwine and interdigitate, creating a dense fibromuscular node.

The modiolus is located laterally to the corner of the mouth, approximately halfway between the base of the nose and the outer edge of the mouth. It is palpable as a small nodule under the skin.

Function

The modiolus plays a crucial role in facial expression and oral functions. It acts as a fulcrum for the muscles of the lips and cheeks, allowing for complex movements during speech, eating, and facial expression.

Clinical significance

Damage to the modiolus, such as from trauma or surgery, can result in facial asymmetry and impaired oral functions. In plastic and reconstructive surgery, the modiolus is a key anatomical landmark.

See also

• Facial muscles
• Facial expression
• Facial nerve

External links

• AnatomyExpert

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