Rectus Abdominis, Sheath and Rectus Sheath Block

Purpose Although the rectus abdominis and its sheath are well known structures, their development in the human fetus is poorly understood. Materials and Methods We examined rectus abdominis and sheath development in semiserial horizontal sections of 18 fetuses at 5-9 weeks of gestation. Results Rect...

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Detalhes bibliográficos
Autores: Yang, Jae Do, Hwang, Hong Pil, Kim, Ji Hyun, Rodríguez Vázquez, José Francisco, Abe, Shinichi, Murakami, Gen, Cho, Baik Hwan
Tipo de documento: artigo
Data de publicação:2019
País:España
Recursos:Universidad Complutense de Madrid (UCM)
Repositório:Docta Complutense
Idioma:inglês
OAI Identifier:oai:docta.ucm.es:20.500.14352/110951
Acesso em linha:https://hdl.handle.net/20.500.14352/110951
Access Level:Acceso aberto
Palavra-chave:611
611.03
Rectus abdominis
Pectoralis
Sternalis
Sternum
Rib
Anatomía
2410.02 Anatomía Humana
2410.06 Embriología Humana
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oai_identifier_str oai:docta.ucm.es:20.500.14352/110951
network_acronym_str ES
network_name_str España
repository_id_str
spelling Rectus Abdominis, Sheath and Rectus Sheath BlockYang, Jae DoHwang, Hong PilKim, Ji HyunRodríguez Vázquez, José FranciscoAbe, ShinichiMurakami, GenCho, Baik Hwan611611.03Rectus abdominisPectoralisSternalisSternumRibAnatomía2410.02 Anatomía Humana2410.06 Embriología HumanaPurpose Although the rectus abdominis and its sheath are well known structures, their development in the human fetus is poorly understood. Materials and Methods We examined rectus abdominis and sheath development in semiserial horizontal sections of 18 fetuses at 5-9 weeks of gestation. Results Rectus muscle differentiation was found to commence above the umbilicus at 6 weeks and extend inferiorly. Until closure of the anterior chest wall via fusion of the bilateral sternal anlagen (at 7 weeks), the anterior rectal sheath originated from the external oblique and developed towards the medial margin of the rectus abdominis at all levels, including the supracostal part. After formation of the anterior sheath, fascial laminae from the internal oblique and transversus abdominis contributed to formation of the posterior rectus sheath. However, the posterior sheath was absent along the supracostal part of the rectus abdominis, as the transversus muscle fibers reached the sternum or the midline area. Therefore, it appeared that resolution of the physiological umbilical hernia (8-9 weeks) as well as chest wall closure was not required for development of the rectus abdominis and its sheath. Conversely, in the inferior part of the two largest fetal specimens, after resolution of the hernia, the posterior sheath underwent secondary disappearance, possibly due to changes in mechanical stress. Conclusion Upward extension of the rectus abdominis suddenly stopped at the margin of the inferiorly developing pectoralis major without facing the external intercostalis. The rectus thoracis, if present, might correspond to the pectoralis.Yonsei University College of MedicineUniversidad Complutense de Madrid20192019-07-1120192019-07-11journal articlehttp://purl.org/coar/resource_type/c_6501VoRhttp://purl.org/coar/version/c_970fb48d4fbd8a85info:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/20.500.14352/110951reponame:Docta Complutenseinstname:Universidad Complutense de Madrid (UCM)Inglésengopen accesshttp://purl.org/coar/access_right/c_abf2Attribution-NonCommercial 4.0 Internationalhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessoai:docta.ucm.es:20.500.14352/1109512026-06-02T12:44:21Z
dc.title.none.fl_str_mv Rectus Abdominis, Sheath and Rectus Sheath Block
title Rectus Abdominis, Sheath and Rectus Sheath Block
spellingShingle Rectus Abdominis, Sheath and Rectus Sheath Block
Yang, Jae Do
611
611.03
Rectus abdominis
Pectoralis
Sternalis
Sternum
Rib
Anatomía
2410.02 Anatomía Humana
2410.06 Embriología Humana
title_short Rectus Abdominis, Sheath and Rectus Sheath Block
title_full Rectus Abdominis, Sheath and Rectus Sheath Block
title_fullStr Rectus Abdominis, Sheath and Rectus Sheath Block
title_full_unstemmed Rectus Abdominis, Sheath and Rectus Sheath Block
title_sort Rectus Abdominis, Sheath and Rectus Sheath Block
dc.creator.none.fl_str_mv Yang, Jae Do
Hwang, Hong Pil
Kim, Ji Hyun
Rodríguez Vázquez, José Francisco
Abe, Shinichi
Murakami, Gen
Cho, Baik Hwan
author Yang, Jae Do
author_facet Yang, Jae Do
Hwang, Hong Pil
Kim, Ji Hyun
Rodríguez Vázquez, José Francisco
Abe, Shinichi
Murakami, Gen
Cho, Baik Hwan
author_role author
author2 Hwang, Hong Pil
Kim, Ji Hyun
Rodríguez Vázquez, José Francisco
Abe, Shinichi
Murakami, Gen
Cho, Baik Hwan
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Universidad Complutense de Madrid
dc.subject.none.fl_str_mv 611
611.03
Rectus abdominis
Pectoralis
Sternalis
Sternum
Rib
Anatomía
2410.02 Anatomía Humana
2410.06 Embriología Humana
topic 611
611.03
Rectus abdominis
Pectoralis
Sternalis
Sternum
Rib
Anatomía
2410.02 Anatomía Humana
2410.06 Embriología Humana
description Purpose Although the rectus abdominis and its sheath are well known structures, their development in the human fetus is poorly understood. Materials and Methods We examined rectus abdominis and sheath development in semiserial horizontal sections of 18 fetuses at 5-9 weeks of gestation. Results Rectus muscle differentiation was found to commence above the umbilicus at 6 weeks and extend inferiorly. Until closure of the anterior chest wall via fusion of the bilateral sternal anlagen (at 7 weeks), the anterior rectal sheath originated from the external oblique and developed towards the medial margin of the rectus abdominis at all levels, including the supracostal part. After formation of the anterior sheath, fascial laminae from the internal oblique and transversus abdominis contributed to formation of the posterior rectus sheath. However, the posterior sheath was absent along the supracostal part of the rectus abdominis, as the transversus muscle fibers reached the sternum or the midline area. Therefore, it appeared that resolution of the physiological umbilical hernia (8-9 weeks) as well as chest wall closure was not required for development of the rectus abdominis and its sheath. Conversely, in the inferior part of the two largest fetal specimens, after resolution of the hernia, the posterior sheath underwent secondary disappearance, possibly due to changes in mechanical stress. Conclusion Upward extension of the rectus abdominis suddenly stopped at the margin of the inferiorly developing pectoralis major without facing the external intercostalis. The rectus thoracis, if present, might correspond to the pectoralis.
publishDate 2019
dc.date.none.fl_str_mv 2019
2019-07-11
2019
2019-07-11
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
VoR
http://purl.org/coar/version/c_970fb48d4fbd8a85
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.14352/110951
url https://hdl.handle.net/20.500.14352/110951
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution-NonCommercial 4.0 International
http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Yonsei University College of Medicine
publisher.none.fl_str_mv Yonsei University College of Medicine
dc.source.none.fl_str_mv reponame:Docta Complutense
instname:Universidad Complutense de Madrid (UCM)
instname_str Universidad Complutense de Madrid (UCM)
reponame_str Docta Complutense
collection Docta Complutense
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,228081

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