 | 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]
- ^ a b c d 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