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In human anatomy, the orbicularis oris muscle is a complex of muscles in the lips that encircles the mouth. [2] It is not a true sphincter , as was once thought, as it is actually composed of four independent quadrants that interlace and give only an appearance of circularity.
The mentalis muscle is a paired central muscle of the lower lip, situated at the tip of the chin. [1] It originates from the mentum of the mandible , and inserts into the soft tissue of the chin. It is sometimes referred to as the "pouting muscle" (as in duck face ) due to it raising the lower lip and causing chin wrinkles .
The facial muscles are just under the skin (subcutaneous) muscles that control facial expression. They generally originate from the surface of the skull bone (rarely the fascia), and insert on the skin of the face. When they contract, the skin moves. These muscles also cause wrinkles at right angles to the muscles’ action line. [2]
You would do 10 crunches, 10 bicycle crunches, and then 10 lower lifts. Repeat that two more times for a total of three rounds and 30 exercises of each! Repeat that two more times for a total of ...
Learn about crunches versus sit-ups, including the muscles they work and how to perform them properly. Plus, why other core exercises are actually better. Learn about crunches versus sit-ups ...
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Damage to the marginal mandibular branch of the facial nerve may cause paralysis of the depressor anguli oris muscle. [1] This may contribute to an asymmetrical smile. [1] This may be corrected by resecting (cutting and removing) the depressor labii inferioris muscle, which has a more significant impact on smiling. [1]
The muscle which can 'cancel' or to some degree reverse the action of the muscle. Muscle synergies are noted in parentheses when relevant. O (Occurrences) Number of times that the named muscle row occurs in a standard human body. Here it may also be denoted when a given muscles only occurs in a male or a female body.