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The Mentalis Muscle is a small, paired facial muscle located in the center of the lower lip and at the tip of the chin (mentum). It is also known as the "pout muscle" because when contracted, it lifts the lower lip, causing chin wrinkles and a duck-like expression. Anatomy Morphology and Connection Points The Mentalis Muscle originates from the mental process of the mandible (the midline of the jawbone), and its fibers insert into the skin of the chin and the soft tissue of the lower lip. It int