Mentalis Muscle
Mentalis is a muscle related to the lower lip. It is also called as the pouting muscle. Mentalis is one of the paired muscles of face present in the centre of face in the bottom above the chin. It is a short conical muscular patch at the frenulum of lower lip.
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Omohyoid Muscle Trapezius Muscle Masseter Muscle Orbicularis Oris Muscle Mentalis Muscle Depressor Labii Inferioris Muscle Depressor Anguli Oris Muscle Buccinator Muscle Zygomaticus Major Muscle Zygomaticus Minor Muscle Levator Labii Superioris Muscle Temporal Muscle Orbicularis Oculi Muscle Sternocleidomastoid Muscle Frontalis Muscle
Mentalis Muscle
Mentalis muscle arises from the incisive fossa of the mandible and gets inserted into the skin of lower lip. It is one of the main muscles of the lower lip.
Mentalis derives it blood supply from the facial artery, a branch of external carotid artery.
It is innervated by the zygomatic branch of the facial nerve.
In addition to directly affecting the lower lip, it imparts its role in facial expressions too. The name mentalis is said to be resulting from its role in facial expressions. It causes the protrusion of the lower lip and elevation of the chin skin. By elevating chin skin, it causes wrinkling over skin of chin.
This small muscle usually does not cause any problem. The major clinical problem associated with mentalis is the geniospasm. This condition starts in the childhood and is said to be genetic in origin. The chin starts quivering rapidly and involuntarily in this disorder.
ORIGIN AND INSERTION
BLOOD SUPPLY
NERVE SUPPLY
FUNCTIONS
RELATED CLINICAL PROBLEMS
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