Department of Anatomy, School of Medicine, Konkuk University, Chungju, Republic of Korea.
Department of Anatomy, Daegu Catholic University School of Medicine, Daegu, Republic of Korea.
Surg Radiol Anat. 2024 Oct;46(10):1653-1657. doi: 10.1007/s00276-024-03456-0. Epub 2024 Aug 13.
This study aimed to elucidate the positions of the extended fibers of the alar part of the nasalis (Na), and their connections to the levator labii superioris (LLS), zygomaticus minor (Zmi), and adjacent skin near the nasal ala.
The extended fibers of the Na were investigated in 54 specimens obtained from 27 embalmed adult South Korean cadavers.
In 51.9% of the specimens, some fibers of the Na extended over the alar facial crease, intermingling or blending with the LLS or Zmi, and attached to the skin lateral to the nasal ala. The quantity and distribution of these extended fibers varied: some fibers of the Na extended and intermingled or blended with the LLS in 25.9%, while another 25.9% exhibited the Na extending in a distinctive fan shape with longer fibers, and combining with both the LLS and Zmi. However, the Na had no extended fibers that reached the LLS, Zmi, or skin near the nasal ala in 48.1%.
Contraction of the Na and its extended fibers can influence the nasal ala and also the laterally located skin and muscles, directing them inferomedially toward the incisive fossa of the maxilla, which is the origin of the nasalis. These insights offer a deeper understanding of the role and actions of facial muscles in facial expression. They will be instrumental in the comprehension and analysis of nose and mouth movements, and in conducting electromyographic analyses in this region.
本研究旨在阐明鼻小柱延伸纤维的位置及其与上唇提肌（LLS）、小翼状肌（Zmi）和鼻翼附近皮肤的连接。
在 27 具韩国成人防腐尸体的 54 个标本中研究了鼻小柱的延伸纤维。
在 51.9%的标本中，一些鼻小柱纤维延伸越过鼻翼面折痕，与 LLS 或 Zmi 交织或混合，并附着在鼻翼外侧的皮肤上。这些延伸纤维的数量和分布各不相同：鼻小柱的一些纤维在 25.9%的标本中延伸并与 LLS 交织或混合，而另外 25.9%的标本则以独特的扇形延伸，更长的纤维与 LLS 和 Zmi 结合。然而，在 48.1%的标本中，鼻小柱没有延伸纤维到达 LLS、Zmi 或鼻翼附近的皮肤。
鼻小柱及其延伸纤维的收缩可以影响鼻翼以及位于鼻翼外侧的皮肤和肌肉，将它们向中线内侧引导至上颌的切齿窝，这是鼻小柱的起源。这些见解提供了对面部肌肉在面部表情中的作用和动作的更深入理解。它们将有助于理解和分析该区域的口鼻运动，并进行该区域的肌电图分析。
