Mentalis
Encyclopedia
The Mentalis is a paired central muscle of the lower lip, situated at the tip of the chin
. It raises and pushes up the lower lip, causing wrinkling of the chin, as in doubt or displeasure. It is sometimes referred to as the "pouting muscle."
Its fibers arise from the incisive fossa of the mandible, then course vertically downward to insert in the skin of the chin.
A movement disorder
of the mentalis muscle is Geniospasm
which is a benign but socially excluding genetic disorder.
Chin
In the human anatomy, the chin is the lowermost part of the face.It is formed by the lower front of the mandible.People show a wide variety of chin structures. See Cleft chin....
. It raises and pushes up the lower lip, causing wrinkling of the chin, as in doubt or displeasure. It is sometimes referred to as the "pouting muscle."
Its fibers arise from the incisive fossa of the mandible, then course vertically downward to insert in the skin of the chin.
A movement disorder
Movement disorder
Movement disorders include:* Akathisia * Akinesia * Associated Movements * Athetosis...
of the mentalis muscle is Geniospasm
Geniospasm
Geniospasm is movement disorder of the mentalis muscle.It is a benign but socially excluding genetic disorder linked to chromosome 9q13-q21 where there are episodic involuntary up and down movements of the chin and lower lip...
which is a benign but socially excluding genetic disorder.