Mentalis

Muscle Origin

Found in the middle of the body of the mandible between the two mental foramen

Anterior mandible. The mentalis is a paired central muscle of the lower lip, situated at the tip of the chin. It originates from the mentum.

Externally, mentalis contraction causes wrinkling of the chin skin, as used in expressions of doubt or displeasure. It is sometimes referred to as the “pouting muscle.”
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Insertion

Chin. It inserts into the chin soft tissue.

Action

Actions elevates and wrinkles skin of chin, protrudes lower lip.

Pouting. In conjunction with orbicularis contraction, the mentalis muscle allows the lips to “pout”. The primary effect of the mentalis contraction is the upward-inward movement of the soft tissue complex of the chin, which raises the central portion of the lips in turn. In the setting of lip incompetence (the upper and lower lips do not touch each other at rest), the mentalis muscle contraction can bring temporary but strained oral competence.

Innervation – Nerve control

Mandibular branch of facial nerve

Artery

 

Antagonist muscles

 

Pictures of muscles

 

Trigger Point Referrals

 

Stretching description

 

Exercises

 

Injuries

 

Treatment

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