Re-evaluation of the orbicularis oculi muscle as revealed by the analysis of isolated muscle specimens.

IF 1.4 4区医学 Q2 Medicine

Surgical and Radiologic Anatomy Pub Date : 2024-12-02 DOI:10.1007/s00276-024-03529-0

Masuko Ishii, Kota Kato, Hidaka Anetai, Koichiro Ichimura, Tatsuo Sakai

{"title":"Re-evaluation of the orbicularis oculi muscle as revealed by the analysis of isolated muscle specimens.","authors":"Masuko Ishii, Kota Kato, Hidaka Anetai, Koichiro Ichimura, Tatsuo Sakai","doi":"10.1007/s00276-024-03529-0","DOIUrl":null,"url":null,"abstract":"Purpose: This study aimed to clarify the origin, insertion, and subdivision of the orbicularis oculi in detail with in situ specimens, as well as with isolated muscle specimens from the superficial and deep aspects.Methods: The periorbital muscles in fifteen cadavers fixed with formalin were examined in situ and/or in isolated muscle specimens, and evaluate their actions.Results: The orbicularis oculi arose via the nasoglabellar aponeurosis, which was observable in the deep aspect of isolated specimens as a rigid sheet of connective tissue in the middle of both orbits and adhered to the dorsum nasi in situ (100%). The two subdivisions of the orbicularis oculi were demarcated at the lateral angle of the eye and exhibited different insertions. The fascicles of the upper and lower halves of the inner part met each other at the lateral canthus and formed a shallow groove between them as observed in situ, and terminated via the lateral palpebral raphe on the deep aspect of the muscle to the temporal fascia. The fascicles of the upper and lower halves of the outer part extended over the orbital margin and intermingled with each other to disperse in the temporal subcutaneous tissue.Conclusions: The nasoglabellar aponeurosis was structurally characterized as the common origin of the periorbital muscles. The present study confirmed that the inner and outer parts of the orbicularis oculi are distinguished by the difference of lateral termination and interpreted as having different function on the palpebral movement in each.","PeriodicalId":49461,"journal":{"name":"Surgical and Radiologic Anatomy","volume":"47 1","pages":"14"},"PeriodicalIF":1.4000,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Surgical and Radiologic Anatomy","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1007/s00276-024-03529-0","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Medicine","Score":null,"Total":0}

引用次数: 0

Abstract

Purpose: This study aimed to clarify the origin, insertion, and subdivision of the orbicularis oculi in detail with in situ specimens, as well as with isolated muscle specimens from the superficial and deep aspects.

Methods: The periorbital muscles in fifteen cadavers fixed with formalin were examined in situ and/or in isolated muscle specimens, and evaluate their actions.

Results: The orbicularis oculi arose via the nasoglabellar aponeurosis, which was observable in the deep aspect of isolated specimens as a rigid sheet of connective tissue in the middle of both orbits and adhered to the dorsum nasi in situ (100%). The two subdivisions of the orbicularis oculi were demarcated at the lateral angle of the eye and exhibited different insertions. The fascicles of the upper and lower halves of the inner part met each other at the lateral canthus and formed a shallow groove between them as observed in situ, and terminated via the lateral palpebral raphe on the deep aspect of the muscle to the temporal fascia. The fascicles of the upper and lower halves of the outer part extended over the orbital margin and intermingled with each other to disperse in the temporal subcutaneous tissue.

Conclusions: The nasoglabellar aponeurosis was structurally characterized as the common origin of the periorbital muscles. The present study confirmed that the inner and outer parts of the orbicularis oculi are distinguished by the difference of lateral termination and interpreted as having different function on the palpebral movement in each.

查看原文本刊更多论文

对眼轮匝肌的重新评价，通过对分离肌肉标本的分析。

目的：本研究旨在通过眼轮匝肌的原位标本和离体肌肉标本从浅、深两个方面详细阐明眼轮匝肌的起源、止点和细分。方法：对15具尸体经福尔马林固定后的眶周肌进行原位和（或）离体肌肉标本检查，评价其作用。结果：眼轮匝肌通过鼻小梁腱膜出现，在离体标本深层可见，在两眼眶中间形成坚硬的结缔组织片，与鼻背原位粘连（100%）。眼轮匝肌的两个分支在眼外侧角处划分，并表现出不同的插入点。内上半部和下半部的肌束在外眦处相接，并在两者之间形成一浅沟，经外侧睑缘在肌深面至颞筋膜处终止。眶外侧上、下半部分的肌束在眶缘上延伸，相互交织，分散于颞部皮下组织。结论：鼻小梁腱膜在结构上具有眶周肌的共同起源特征。本研究证实了眼轮匝肌的内外部是通过外侧终止的不同来区分的，并解释了它们对眼睑运动的不同作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Surgical and Radiologic Anatomy Medicine-Pathology and Forensic Medicine

CiteScore

2.40

自引率

14.30%

发文量

期刊介绍： Anatomy is a morphological science which cannot fail to interest the clinician. The practical application of anatomical research to clinical problems necessitates special adaptation and selectivity in choosing from numerous international works. Although there is a tendency to believe that meaningful advances in anatomy are unlikely, constant revision is necessary. Surgical and Radiologic Anatomy, the first international journal of Clinical anatomy has been created in this spirit. Its goal is to serve clinicians, regardless of speciality-physicians, surgeons, radiologists or other specialists-as an indispensable aid with which they can improve their knowledge of anatomy. Each issue includes: Original papers, review articles, articles on the anatomical bases of medical, surgical and radiological techniques, articles of normal radiologic anatomy, brief reviews of anatomical publications of clinical interest. Particular attention is given to high quality illustrations, which are indispensable for a better understanding of anatomical problems. Surgical and Radiologic Anatomy is a journal written by anatomists for clinicians with a special interest in anatomy.