Muscle details :-
The mentalis is a paired central muscle of the lower lip, situated at the tip of the chin. It originates from the mentum and inserts into the chin soft tissue.
The origin of a muscle refers to the location in the body in which the muscle begins. The origin of the mentalis muscle is the incisive fossa of the mandible.
The insertion point of the mentalis muscle is skin of the lower lip. Since it attaches to the skin of the lower lip, when this muscle contracts.
Nerve supply :-
Mandibular branch of facial nerve (VII).
Mentalis has two actions:
– protrusion of the lower lip
– elevation and wrinkling of the skin of the chin
Ralated pathology :-
In Bell’s palsy mentalis muscle commonly paralysis .