Arcuate line of rectus sheath: Difference between revisions
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{{Short description|Line of demarcation in the human abdomen}} |
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{{Refimprove|date=March 2014}} |
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{{Redirect-distinguish|Linea semicircularis|Linea semilunaris}} |
{{Redirect-distinguish|Linea semicircularis|Linea semilunaris}} |
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{{Technical|date=December 2023}} |
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{{Infobox anatomy |
{{Infobox anatomy |
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| Name = Arcuate line of rectus sheath |
| Name = Arcuate line of rectus sheath |
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| Latin = |
| Latin = linea arcuata vaginae musculi recti abdominis |
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| GraySubject = 118 |
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| GrayPage = 416 |
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| Image = Gray398.png |
| Image = Gray398.png |
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| Caption = The [[interfoveolar ligament]], seen from in front. (Linea semicircularis labeled at center top.) |
| Caption = The [[interfoveolar ligament]], seen from in front. (Linea semicircularis labeled at center top.) |
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| Caption2 = |
| Caption2 = |
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| System = |
| System = |
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| MeshName = |
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| MeshNumber = |
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| DorlandsPre = l_10 |
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| DorlandsSuf = 12496056 |
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}} |
}} |
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The '''arcuate line of rectus sheath''' (the '''arcuate line''' or the '''semicircular line of Douglas''') is a line of demarcation<ref name=":1">{{Citation |last1=Sevensma |first1=Karlin E. |title=Anatomy, Abdomen and Pelvis, Rectus Sheath |date=2023 |url=http://www.ncbi.nlm.nih.gov/books/NBK537153/ |work=StatPearls |access-date=2023-05-16 |place=Treasure Island (FL) |publisher=StatPearls Publishing |pmid=30725838 |last2=Leavitt |first2=Logan |last3=Pihl |first3=Kerent D.}}</ref> corresponding to the free inferior margin of the posterior layer of the [[rectus sheath]]'''<ref name=":023">{{Cite book |last=Sinnatamby |first=Chummy |title=Last's Anatomy |publisher= Elsevier Australia|year=2011 |isbn=978-0-7295-3752-0 |edition=12th |pages=224–225}}</ref>''' inferior to which only the anterior layer of the rectus sheath is present<ref name=":2">{{Citation |last1=Nassereddin |first1=Ali |title=Anatomy, Abdomen and Pelvis: Linea Semilunaris |date=2023 |url=http://www.ncbi.nlm.nih.gov/books/NBK555983/ |work=StatPearls |access-date=2023-05-16 |place=Treasure Island (FL) |publisher=StatPearls Publishing |pmid=32310443 |last2=Sajjad |first2=Hussain}}</ref> and the rectus abdominis muscle is therefore in direct contact with the [[transversalis fascia]].<ref name=":1" /> The arcuate line is concave inferior-wards.'''<ref name=":023" />''' |
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The '''arcuate line of the abdomen''', '''{{lang|la|linea semicircularis}}''' or '''Douglas' line''' is a horizontal line that demarcates the lower limit of the posterior layer of the [[rectus sheath]]. It is also where the [[inferior epigastric]] vessels perforate the [[rectus abdominis]]. |
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The arcuate line is visible upon the inner surface of the abdominal wall.<ref name=":1" /> The arcuate line may be a well-defined,<ref name=":1" />'''<ref name=":023" />''' or may be represented by a gradual waning of the aponeurotic fibres with concomitant increasing prominence of the [[transversalis fascia]].'''<ref name=":023" />''' The arcuate line occurs about midway between the [[Navel|umbilicus]] and [[pubic symphysis]],<ref name=":2" /> however, this varies from person to person.{{Citation needed|date=May 2023}} |
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Superior to the arcuate line, the [[internal oblique]] [[aponeurosis]] splits to envelop the rectus abdominis muscle. Inferior to the arcuate line, the internal oblique and [[transversus abdominis]] aponeuroses merge and pass superficial (i.e. anteriorly) to the [[rectus abdominis muscle|rectus muscle]]. |
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The [[inferior epigastric artery]] and [[inferior epigastric vein|vein]] pass across the arcuate line to enter the rectus sheath.'''<ref name=":023" />''' |
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The arcuate line occurs about 1/3 of the distance from the [[Navel|umbilicus]] to the [[pubic crest]], but this varies from person to person. Above the arcuate line, the [[rectus abdominis]] is surrounded by an anterior layer of the [[rectus sheath]] and a posterior layer. The anterior layer is derived from the [[external oblique]] [[aponeurosis]] and the anterior lamina of the [[internal oblique]] aponeurosis. The posterior layer is made up of the posterior lamina of the internal oblique aponeurosis and the transversus abdominis aponeurosis. Inferior to the arcuate line, all three muscle aponeuroses make up the rectus sheath, that is now only anterior to the rectus abdominis and not posterior to it at all. |
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== Anatomy == |
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Therefore, inferior to the arcuate line, the rectus abdominis rests directly on the [[transversalis fascia]]. |
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Superior to the arcuate line, the [[Abdominal internal oblique muscle|internal oblique muscle]] [[aponeurosis]] splits to envelop the [[rectus abdominis muscle]] both anteriorly and posteriorly. The anterior layer is derived from the [[external oblique]] [[aponeurosis]] and the anterior lamina of the [[internal oblique]] aponeurosis.<ref name=":0">{{Cite journal|last1=Raj|first1=Prasanta K.|last2=Sidhu|first2=Ramandeep S.|last3=Taylor|first3=Michael D.|last4=Buckley|first4=Brooke M.|last5=Scarcipino|first5=Mario A.|date=2005-03-01|title=New anatomic repair of midline abdominal wall incisions extending to suprapubic region|url=http://www.sciencedirect.com/science/article/pii/S0149794404001643|journal=Current Surgery|language=en|volume=62|issue=2|pages=226–230|doi=10.1016/j.cursur.2004.07.015|pmid=15796945|issn=0149-7944}}</ref> The posterior layer is made up of the posterior lamina of the internal oblique aponeurosis and the transversus abdominis aponeurosis.<ref name=":1" /> |
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Inferior to the arcuate line, the aponeuroses of the [[Abdominal external oblique muscle|external oblique muscle]], the [[Abdominal internal oblique muscle|internal oblique muscle]], and the [[transversus abdominis|transversus abdominis muscle]] merge and pass superficial to the [[rectus abdominis muscle]].<ref name=":0" /> Therefore, inferior to the arcuate line, the rectus abdominis rests directly on the [[transversalis fascia]].<ref name=":1" /> |
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If one dissects the anterolateral [[abdominal wall]], the arcuate line may be difficult to see, since all the aponeuroses are [[translucent]]. |
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== Clinical significance == |
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[[Spigelian hernia|Spigelian hernias]] and, exceedingly rarely, '''arcuate line hernias''' may occur inferior to the arcuate line.{{Citation needed|date=May 2023}} |
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The arcuate line must be incised at its lateral-most point in order to enter the [[Retropubic space|space of Retzius]] and [[Retroinguinal space|space of Bogros]] from within the rectus sheath during surgery during retrorectus repair and transversus abdominis release.{{Citation needed|date=May 2023}} |
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== History == |
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The arcuate line is also known as the linea semicircularis, and the semicircular line of Douglas.<ref>{{Cite journal|last1=Cavagna|first1=E.|last2=Carubia|first2=G.|last3=Schiavon|first3=F.|date=June 2000|title=[Anatomo-radiologic correlations in spontaneous hematoma of the rectus abdominis muscles]|url=https://pubmed.ncbi.nlm.nih.gov/11262819/|journal=La Radiologia Medica|volume=99|issue=6|pages=432–437|issn=0033-8362|pmid=11262819|via=}}</ref> |
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==References== |
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{{Reflist}} |
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==External links== |
==External links== |
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* {{SUNYAnatomyImage|7|1|13}} |
* {{SUNYAnatomyImage|7|1|13}} |
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* {{SUNYAnatomyImage|7|5|73}} |
* {{SUNYAnatomyImage|7|5|73}} |
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* {{GPnotebook|1751842873}} |
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* {{NormanAnatomy|rectussheath}} |
* {{NormanAnatomy|rectussheath}} |
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* {{cite journal | author = Rizk N | title = The arcuate line of the rectus sheath--does it exist? | journal = J Anat | volume = 175 |
* {{cite journal | author = Rizk N | title = The arcuate line of the rectus sheath--does it exist? | journal = J Anat | volume = 175 | pages = 1–6 | year = 1991 | pmid = 1828798 | pmc=1224464}} |
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* {{UMichAtlas|abdo_wall61}} - "Anterior Abdominal Wall, Lower Part, Posterior View" |
* {{UMichAtlas|abdo_wall61}} - "Anterior Abdominal Wall, Lower Part, Posterior View" |
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{{Muscles of trunk}} |
{{Muscles of trunk}} |
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{{Authority control}} |
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[[Category:Abdomen]] |
[[Category:Abdomen]] |
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Latest revision as of 15:36, 5 March 2024
 | This article may be too technical for most readers to understand. (December 2023) |
| Arcuate line of rectus sheath | |
|---|---|
 The interfoveolar ligament, seen from in front. (Linea semicircularis labeled at center top.) | |
| Details | |
| Identifiers | |
| Latin | linea arcuata vaginae musculi recti abdominis |
| TA98 | A04.5.01.006 |
| TA2 | 2362 |
| FMA | 16919 |
| Anatomical terminology | |
The arcuate line of rectus sheath (the arcuate line or the semicircular line of Douglas) is a line of demarcation[1] corresponding to the free inferior margin of the posterior layer of the rectus sheath[2] inferior to which only the anterior layer of the rectus sheath is present[3] and the rectus abdominis muscle is therefore in direct contact with the transversalis fascia.[1] The arcuate line is concave inferior-wards.[2]
The arcuate line is visible upon the inner surface of the abdominal wall.[1] The arcuate line may be a well-defined,[1][2] or may be represented by a gradual waning of the aponeurotic fibres with concomitant increasing prominence of the transversalis fascia.[2] The arcuate line occurs about midway between the umbilicus and pubic symphysis,[3] however, this varies from person to person.[citation needed]
The inferior epigastric artery and vein pass across the arcuate line to enter the rectus sheath.[2]
Anatomy
[edit]Superior to the arcuate line, the internal oblique muscle aponeurosis splits to envelop the rectus abdominis muscle both anteriorly and posteriorly. The anterior layer is derived from the external oblique aponeurosis and the anterior lamina of the internal oblique aponeurosis.[4] The posterior layer is made up of the posterior lamina of the internal oblique aponeurosis and the transversus abdominis aponeurosis.[1]
Inferior to the arcuate line, the aponeuroses of the external oblique muscle, the internal oblique muscle, and the transversus abdominis muscle merge and pass superficial to the rectus abdominis muscle.[4] Therefore, inferior to the arcuate line, the rectus abdominis rests directly on the transversalis fascia.[1]
Clinical significance
[edit]Spigelian hernias and, exceedingly rarely, arcuate line hernias may occur inferior to the arcuate line.[citation needed]
The arcuate line must be incised at its lateral-most point in order to enter the space of Retzius and space of Bogros from within the rectus sheath during surgery during retrorectus repair and transversus abdominis release.[citation needed]
History
[edit]The arcuate line is also known as the linea semicircularis, and the semicircular line of Douglas.[5]
References
[edit]- ^ a b c d e f Sevensma, Karlin E.; Leavitt, Logan; Pihl, Kerent D. (2023), "Anatomy, Abdomen and Pelvis, Rectus Sheath", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 30725838, retrieved 2023-05-16
- ^ a b c d e Sinnatamby, Chummy (2011). Last's Anatomy (12th ed.). Elsevier Australia. pp. 224–225. ISBN 978-0-7295-3752-0.
- ^ a b Nassereddin, Ali; Sajjad, Hussain (2023), "Anatomy, Abdomen and Pelvis: Linea Semilunaris", StatPearls, Treasure Island (FL): StatPearls Publishing, PMID 32310443, retrieved 2023-05-16
- ^ a b Raj, Prasanta K.; Sidhu, Ramandeep S.; Taylor, Michael D.; Buckley, Brooke M.; Scarcipino, Mario A. (2005-03-01). "New anatomic repair of midline abdominal wall incisions extending to suprapubic region". Current Surgery. 62 (2): 226–230. doi:10.1016/j.cursur.2004.07.015. ISSN 0149-7944. PMID 15796945.
- ^ Cavagna, E.; Carubia, G.; Schiavon, F. (June 2000). "[Anatomo-radiologic correlations in spontaneous hematoma of the rectus abdominis muscles]". La Radiologia Medica. 99 (6): 432–437. ISSN 0033-8362. PMID 11262819.
External links
[edit]- Anatomy photo:35:13-0101 at the SUNY Downstate Medical Center - "Anterior Abdominal Wall: The Posterior Wall of the Rectus Sheath"
- Anatomy image:7113 at the SUNY Downstate Medical Center
- Anatomy image:7573 at the SUNY Downstate Medical Center
- rectussheath at The Anatomy Lesson by Wesley Norman (Georgetown University)
- Rizk N (1991). "The arcuate line of the rectus sheath--does it exist?". J Anat. 175: 1–6. PMC 1224464. PMID 1828798.
- Atlas image: abdo_wall61 at the University of Michigan Health System - "Anterior Abdominal Wall, Lower Part, Posterior View"
