Preferred Label : levator labii superioris;
Uberon definition : The levator labii superioris (or quadratus labii superioris) is a broad sheet, the
origin of which extends from the side of the nose to the zygomatic bone. Its medial
fibers form the angular head, which arises by a pointed extremity from the upper part
of the frontal process of the maxilla and passing obliquely downward and lateralward
divides into two slips. One of these is inserted into the greater alar cartilage and
skin of the nose; the other is prolonged into the lateral part of the upper lip, blending
with the infraorbital head and with the Orbicularis oris. 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 Caninus. The lateral fibers, forming
the zygomatic head, arise from the malar surface of the zygomatic bone immediately
behind the zygomaticomaxillary suture and pass downward and medialward to the upper
lip. [WP,unvetted].;
Origin ID : 0001580;
UMLS CUI : C1704248;
Automatic exact mappings (from CISMeF team)
- Semantic type(s)
- UMLS correspondences (same concept)
- Uberon cross reference
- has muscle insertion
The levator labii superioris (or quadratus labii superioris) is a broad sheet, the
origin of which extends from the side of the nose to the zygomatic bone. Its medial
fibers form the angular head, which arises by a pointed extremity from the upper part
of the frontal process of the maxilla and passing obliquely downward and lateralward
divides into two slips. One of these is inserted into the greater alar cartilage and
skin of the nose; the other is prolonged into the lateral part of the upper lip, blending
with the infraorbital head and with the Orbicularis oris. 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 Caninus. The lateral fibers, forming
the zygomatic head, arise from the malar surface of the zygomatic bone immediately
behind the zygomaticomaxillary suture and pass downward and medialward to the upper
lip. [WP,unvetted].
