New Insight Regarding the Zygomaticus Minor as Related to Cosmetic Facial Injections

Mi Sun Hur, Kwan Hyun Youn, Hee Jin Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

The present study aimed to determine the arrangement and terminal attachments of the zygomaticus minor (Zmi) muscle fibers connecting the orbital and mouth regions. The Zmi was examined in 32 specimens of embalmed Korean adult cadavers. The Zmi was present in all 32 specimens (100%). In 31 of the specimens (96.9%), the Zmi that inserted into the upper lip was formed by muscle fibers that arose from the zygomatic bone and muscle fibers that extended from the orbicularis oculi (OOc) muscle. In 14 of the specimens (43.8%), some fibers of the Zmi that arose from the zygomatic bone blended with the inferior margin of the OOc, while the other fibers inserted into the upper lip. After the Zmi fibers blended with the inferior margin of the OOc, these fibers constituted the inferior and medial margins of the OOc. These fibers were then attached to the medial palpebral ligament, the maxilla, the levator labii superioris alaeque nasi muscle, and the depressor supercilii muscle. In 30 of 32 specimens (93.8%), muscle fibers that extended from the OOc constituted the lateral margin of the Zmi, usually descending to the level between the nasal ala and the vermilion border of the upper lip and inserting into the upper lip. The obtained data will be helpful for understanding their connected movements and in kinematics and electromyographic analyses, therapies involving injections of botulinum toxin Type A, and various types of facial surgery. Clin. Anat. 31:974–980, 2018.

Original languageEnglish
Pages (from-to)974-980
Number of pages7
JournalClinical Anatomy
Volume31
Issue number7
DOIs
Publication statusPublished - 2018 Oct

Bibliographical note

Funding Information:
*Correspondence to: Hee-Jin Kim, Division in Anatomy and Developmental Biology, Department of Oral Biology, College of Dentistry, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 120-752, South Korea. E-mail: hjk776@yuhs.ac This research was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2016R1D1A1B03930402). And this work was supported by research fund of Catholic Kwandong University (CKURF-201802650001).

All Science Journal Classification (ASJC) codes

  • Anatomy
  • Histology

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