Overriding of the preseptal orbicularis oculi muscle in Caucasian cadavers

Hirohiko Kakizaki1,2, Weng Onn Chan2, Yasuhiro Takahashi3, Dinesh Selva21Department of Ophthalmology, Aichi Medical University, Nagakute, Aichi, Japan; 2South Australian Institute of Ophthalmology and Discipline of Ophthalmology and Visual Sciences, University of Adelaide, Australia; 3Department of...

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Autores principales:	Hirohiko Kakizaki, Weng Onn Chan, Yasuhiro Takahashi, Dinesh Selva
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2009
Materias:	Ophthalmology RE1-994
Acceso en línea:	https://doaj.org/article/e817cf58094f4980a7127c6f47bf0ff7
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spelling	oai:doaj.org-article:e817cf58094f4980a7127c6f47bf0ff72021-12-02T06:33:40ZOverriding of the preseptal orbicularis oculi muscle in Caucasian cadavers1177-54671177-5483https://doaj.org/article/e817cf58094f4980a7127c6f47bf0ff72009-03-01T00:00:00Zhttp://www.dovepress.com/overriding-of-the-preseptal-orbicularis-oculi-muscle-in-caucasian-cada-a2929https://doaj.org/toc/1177-5467https://doaj.org/toc/1177-5483Hirohiko Kakizaki1,2, Weng Onn Chan2, Yasuhiro Takahashi3, Dinesh Selva21Department of Ophthalmology, Aichi Medical University, Nagakute, Aichi, Japan; 2South Australian Institute of Ophthalmology and Discipline of Ophthalmology and Visual Sciences, University of Adelaide, Australia; 3Department of Ophthalmology and Visual Sciences, Osaka City University Graduate School of Medicine, Osaka, Japan Abstract: We aimed to microscopically examine whether Caucasian eyelids demonstrate overriding of preseptal orbicularis oculi muscle (OOM) over the pretarsal OOM in both lower and upper eyelids. Full thickness sections of 13 lower eyelids and 11 upper eyelids from seven Caucasian cadavers were examined. In the lower eyelids, all 13 specimens demonstrated clear overriding of preseptal OOM over the pretarsal OOM. The overriding part extended almost to the level of lower eyelid margin. However, in the upper eyelids, only one of the 11 eyelids demonstrated overriding, and the overriding part only extended to the level of mid-tarsal plate. Our result strongly supports the hypothesis of overriding of the preseptal OOM over the pretarsal OOM as an etiology of involutional lower eyelid entropion. The relatively low frequency of upper eyelid overriding preseptal OOM in our study reflects and may explain the rare occurrence of involutional upper eyelid entropion.Keywords: Caucasian, overriding, orbicularis oculi muscle, preseptal, pretarsal Hirohiko KakizakiWeng Onn ChanYasuhiro TakahashiDinesh SelvaDove Medical PressarticleOphthalmologyRE1-994ENClinical Ophthalmology, Vol 2009, Iss default, Pp 243-246 (2009)
institution	DOAJ
collection	DOAJ
language	EN
topic	Ophthalmology RE1-994
spellingShingle	Ophthalmology RE1-994 Hirohiko Kakizaki Weng Onn Chan Yasuhiro Takahashi Dinesh Selva Overriding of the preseptal orbicularis oculi muscle in Caucasian cadavers
description	Hirohiko Kakizaki1,2, Weng Onn Chan2, Yasuhiro Takahashi3, Dinesh Selva21Department of Ophthalmology, Aichi Medical University, Nagakute, Aichi, Japan; 2South Australian Institute of Ophthalmology and Discipline of Ophthalmology and Visual Sciences, University of Adelaide, Australia; 3Department of Ophthalmology and Visual Sciences, Osaka City University Graduate School of Medicine, Osaka, Japan Abstract: We aimed to microscopically examine whether Caucasian eyelids demonstrate overriding of preseptal orbicularis oculi muscle (OOM) over the pretarsal OOM in both lower and upper eyelids. Full thickness sections of 13 lower eyelids and 11 upper eyelids from seven Caucasian cadavers were examined. In the lower eyelids, all 13 specimens demonstrated clear overriding of preseptal OOM over the pretarsal OOM. The overriding part extended almost to the level of lower eyelid margin. However, in the upper eyelids, only one of the 11 eyelids demonstrated overriding, and the overriding part only extended to the level of mid-tarsal plate. Our result strongly supports the hypothesis of overriding of the preseptal OOM over the pretarsal OOM as an etiology of involutional lower eyelid entropion. The relatively low frequency of upper eyelid overriding preseptal OOM in our study reflects and may explain the rare occurrence of involutional upper eyelid entropion.Keywords: Caucasian, overriding, orbicularis oculi muscle, preseptal, pretarsal
format	article
author	Hirohiko Kakizaki Weng Onn Chan Yasuhiro Takahashi Dinesh Selva
author_facet	Hirohiko Kakizaki Weng Onn Chan Yasuhiro Takahashi Dinesh Selva
author_sort	Hirohiko Kakizaki
title	Overriding of the preseptal orbicularis oculi muscle in Caucasian cadavers
title_short	Overriding of the preseptal orbicularis oculi muscle in Caucasian cadavers
title_full	Overriding of the preseptal orbicularis oculi muscle in Caucasian cadavers
title_fullStr	Overriding of the preseptal orbicularis oculi muscle in Caucasian cadavers
title_full_unstemmed	Overriding of the preseptal orbicularis oculi muscle in Caucasian cadavers
title_sort	overriding of the preseptal orbicularis oculi muscle in caucasian cadavers
publisher	Dove Medical Press
publishDate	2009
url	https://doaj.org/article/e817cf58094f4980a7127c6f47bf0ff7
work_keys_str_mv	AT hirohikokakizaki overridingofthepreseptalorbicularisoculimuscleincaucasiancadavers AT wengonnchan overridingofthepreseptalorbicularisoculimuscleincaucasiancadavers AT yasuhirotakahashi overridingofthepreseptalorbicularisoculimuscleincaucasiancadavers AT dineshselva overridingofthepreseptalorbicularisoculimuscleincaucasiancadavers
_version_	1718399908021534720

Overriding of the preseptal orbicularis oculi muscle in Caucasian cadavers

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