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The philtrum (Latin: philtrum from Ancient Greek φίλτρον phíltron, lit. "love charm" [2]) or medial cleft is a vertical indentation in the middle area of the upper lip, common to therian mammals, extending in humans from the nasal septum to the tubercle of the upper lip.
They separate the cheeks from the upper lip. The term derives from Latin nasus for "nose" and labium for "lip". Other people suggest the term melolabial fold, [clarification needed] [4] or the lip-cheek fold or groove. [5] It is also known as the nasolabial sulcus.
Two mouth characteristics separate the harelip sucker from all other catostomids: a nonprotractile upper lip and a lower lip that is divided into two distinct lobes. The head is short, accounting for only 20 to 22 percent of the standard length. The dorsal fin has 11 or 12 soft rays, and its free margin is slightly concave.
The intermediate portion or infraorbital head arises from the lower margin of the orbit immediately above the infraorbital foramen, some of its fibers being attached to the maxilla, others to the zygomatic bone. Its fibers converge, to be inserted into the muscular substance of the upper lip between the angular head and the levator anguli oris.
Though not every patient has all features, commonly found signs include macrocephaly, congenital macrosomia, extensive cutaneous capillary malformation (naevus flammeus or port-wine stain type birthmark over much of the body; a capillary malformation of the upper lip or philtrum is seen in many patients with this condition), body asymmetry ...
A thin, narrow, moustache that grows downward in two very long tendrils from the upper lip, with the tapered, pointed ends hanging past the jawline. It is similar to the horseshoe moustache, but differentiated by the chin and cheeks area being smooth shaven with the lip tendrils overhanging them.
Clinical determinants include soft tissue analysis where the clinician assesses nasolabial angle, the relationship of the soft tissue portion of the chin to the nose, and the relationship between the upper and lower lips; also used is dental arch relationship assessment such as Angle's classification. [citation needed]
Firstly the group of muscles required to purse the lips run through the upper lip. To restore the complete group a full incision must be made. Secondly, to create a less obvious scar the surgeon tries to line up the scar with the natural lines in the upper lip (such as the edges of the philtrum) and tuck away stitches as far up the nose as ...