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Mentalis Muscle: Definition, Function & Location

Instructor: Dan Washmuth

Dan has taught college Nutrition, Anatomy, Physiology, and Sports Nutrition courses and has a master's degree in Dietetics & Nutrition.

The mentalis muscle is a muscle located between the tip of the chin and the lower lip. In this lesson, learn about the definition, function, and location of the mentalis muscle.

Mentalis Muscle

Olivia is a five year old who was sitting with her classmates in her preschool class and they were all getting ready for snack time. The teacher gave each student five crackers. However, Justin, a boy in the class, stole all of Olivia's crackers and quickly shoved them in his mouth.

Olivia was very mad and immediately went to her teacher to tell on Justin. When Olivia told her teacher that Justin took all her crackers, the teacher said she was sorry but she didn't have anymore crackers to give out so she could not give her any more. Olivia then began to pout, with her arms crossed in front of her chest, her eyebrows furrowed, and her bottom lip pouting out.

The mentalis muscle is nicknamed the pouting muscle.
pouting face

Did you know that there is actually a muscle in the face that is nicknamed the pouting muscle because it causes the lips to form a pouting face, just like Olivia's? This muscle is officially called the mentalis muscle.

Mentalis Muscle: Definition & Location

The mentalis muscle is classified as a facial muscle and it is located in the area between the tip of the chin and the lower lip. Specifically, this muscle originates (starts) at the incisive fossa of the mandible (which is a depressed area in the chin area of the lower jaw) and travels upward and inserts (ends) in the skin of the lower lip.

The mentalis muscle receives electrical impulses from the brain through the cranial nerve VII, which is also known as the facial nerve. The process of a muscle receiving electrical impulses from a nerve is called innervation. The mentalis muscle receives its blood supply from the facial artery. The facial artery is a small branch of the carotid artery, which is a very large blood vessel that runs up the neck and into the head/skull.

The mentalis muscle, shown in red, is a muscle located between the tip of the chin and the lower lip.
mentalis muscle

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