Muscle, chin-labial (M. Mentolabialis)

The chin-labial muscle is located behind the transition of the lower jaw to the maxillary region. It is divided into 2 parts: anterior - sublingual and posterior - subcutaneous. These parts are connected to each other by the anterior border of the muscle and are attached to the skin of the chin and the inner surface of the corner of the mouth.

Function: pulls the lower jaw towards the upper, pushes it forward, closes and opens the mouth. Consists of a large number of muscle fibers. With unilateral contraction, the lower jaw deviates in its direction.

What is the M. mentholabilis muscle?

The Mentholabelis muscle is a poorly developed layer of oral muscles that are found on the sides of the cheek. Muscle tissue surrounds the nasolabial folds and, in combination with numerous ligaments and fat, determines the shape and size of the lower part of the face.

Where is the muscle menthabelis located? **Muscular **region of the submandibular masseter muscle connects at the condyle. Its outer part is located above or below the condyles in relation to the sphenoid bone. The middle and inner parts of the muscle formation extend far into the oropharynx area, located on the left and right sides so that they cover the condyles of the lower jaw, connecting with the zygomatic muscle. The inner part descends to the bottom of the mouth, where the **muscle meets the corners of the lips.**

How does the Mentobilis muscle take part in the act of breathing?

Internal compression of the lips during the formation of an air vacuum in the exhalation phase leads to their relaxation and opening of the oral cavity. This movement provokes a lowering of the anterior wall of the pharynx and soft palate, the process of expansion of the gastric walls and an increase in their volume. The act of breathing is accompanied by straightening of the upper part of the lung and expiration of air. Therefore, this aspect of the work of the muscular tissues of the oral cavity is important for the health and full functioning of the lungs.