Levator labii superioris muscle
Citation, DOI & article data
It is not to be confused with the levator labii superioris alaeque nasalis muscle, which has a very similar name, at least partially covers it, and extends and inserts medial to it.
- origin: inferior orbital rim of maxilla
- insertion: upper lip (vermillion border)
- innervation: facial nerve (VII)
- action: raises upper lip
The levator labii superioris muscle originates from the maxilla that forms the inferior aspect of the orbit. It passes down over the infraorbital foramen, from which the infraorbital nerve exits, and extends inferiorly to attach into the vermillion margin of the upper lip 1-3.
The levator labii superioris muscles were found in a cadaveric study to be symmetric when left and right sides were compared, with similar anatomies in the sexes 3.
- key elevator of the upper lip
- primary muscle responsible for maintenance of the philtrum ridges and Cupid bow of the superior vermillion border 6
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- 2. Richard S. Snell. Clinical anatomy for medical students. (1992)
- 3. Hwang WS, Hur MS, Hu KS, Song WC, Koh KS, Baik HS, Kim ST, Kim HJ, Lee KJ. Surface anatomy of the lip elevator muscles for the treatment of gummy smile using botulinum toxin. (2009) The Angle orthodontist. 79 (1): 70-7. doi:10.2319/091407-437.1 - Pubmed
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- 6. Latham RA, Deaton TG. The structural basis of the philtrum and the contour of the vermilion border: a study of the musculature of the upper lip. (1976) Journal of anatomy. 121 (Pt 1): 151-60. Pubmed