Anatomy of the muscles of the lip and nose

As for the lip, as we mentioned, some muscles are common to the cheek, and some are unique to the lip. There are four of these last muscles. A couple of them go to the lip from above, from the top of the cheeks, and come close to the edge of the lip, and the other two muscles go from below. These four muscles are enough to move the lip alone, because each muscle, when it comes into motion, moves the lip to the corner of the mouth at which the muscle is located, and when two muscles lying on both sides move, the lip is stretched in one direction or the other . Thus, thanks to these muscles, the lip moves in all four directions. The lip has no other movements, so these four muscles are enough.

These four muscles and the ends of the common muscle with the cheek merge to such an extent with the body of the lip that by touch it is impossible to distinguish them from the substance of the lip itself, since the lip is a soft, fleshy organ in which there are no bones.

As for the edges of the wings of the nose, two small strong muscles adjoin them. They are small in order not to crowd other muscles that are more necessary, because the movements of the cheeks and lips are more numerous, are repeated more often and last longer, so that the need for them is more urgent than for the movements of the wings of the nose. And they were created strong in order to compensate with their strength the damage that they suffer due to the lack of bones. These muscles come from the cheekbone and first merge with other fibers coming from the cheekbone. And they come from the side of the cheekbone only because they move the wings of the nose towards the cheekbone.