Figure 3-16. - Muscle anatomy of mastication.
Table 3-3. - Muscles of Facial Expression
|Orbicularis oris||Encircles the mouth (no attachement to bone)||Corners of the mouth||Located between the skin and mucous membranes of the lips. Makes lips close and pucker.|
|Buccinator||Alveolar process of maxilla and mandible||Orbicularis oris at the corner of the mouth||Located in the walls of the cheeks, holds food in contact with teeth when chewing, and assists in blowing air out of the mouth.|
|Mentalis||Mandible||Skin of chin||Raises and wrinkles the skin of the chin and decreases and protrudes the lower lip.|
|Zygomaticus Major||Zygomatic bone||Orbicularis oris (angle of the mouth)||Raises the corner of the mouth when smiling.|