Posterior Rectus Sheath
Posterior Rectus Sheath - Related Videos
11:12
In situ Transverse Rectus Abdominis Myocutaneous Flap: A Rat Model of Myocutaneous Ischemia Reperfusion Injury
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Cited by 10 •
2013
Free tissue transfer is widely employed in reconstructive surgery to restore form and function following oncological resection and trauma. Preconditioning this tissue prior to surgery may improve outcome. This article describes an in situ transverse rectus abdominis myocutaneous flap (TRAM) in rats as a means for testing preconditioning strategies.
14:54
Rat Model of Photochemically-Induced Posterior Ischemic Optic Neuropathy
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Cited by 2 •
2015
The goal of this protocol is to photochemically induce ischemic injury to the posterior optic nerve in rat. This model is critical to studies of the pathophysiology of posterior ischemic optic neuropathy, and therapeutic approaches for this and other optic neuropathies, as well as of other CNS ischemic diseases.
03:26
Isolating Short Posterior Ciliary Arteries: A Protocol to Excise Intact Short Posterior Ciliary Microvessels from Porcine Eye
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2025
This video describes the protocol to isolate the short posterior ciliary arteries from the porcine eye. The isolated short posterior arteries are a suitable source for elucidating the molecular insights and protein profiles of the ocular blood vessels.
06:09
Optic Nerve Sheath Point of Care Ultrasound: Image Acquisition
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Cited by 1 •
2023
Point-of-care ultrasound (POCUS) of the optic nerve sheath diameter (ONSD) has been shown to be useful in identifying patients with increased intracranial pressure (ICP). However, the non-standardized technique for this POCUS has hampered its use. We present a standardized image acquisition protocol for use in the acute care setting.
06:02
Posterior Approach for Debridement of the Psoas Abscess
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2020
This is a cadaveric study investigating the landmarks for the posterior approach for irrigation and debridement of the psoas abscess. The interval between the transverse processes (TP) was used to access the substance of the psoas muscle.
FAQs
The arcuate line identifies a change in how the abdominal wall transmits support around the rectus abdominis. Superiorly, posterior aponeurotic layers contribute to the wall behind the muscle; inferiorly, those layers move anteriorly, leaving the muscle against the transversalis fascia. Recognizing this transition helps explain regional differences in anatomy and guides interpretation of operative or imaging findings.
Its layered aponeurotic arrangement helps enclose the rectus abdominis and distribute tension through the anterior abdominal wall. Instead of concentrating force within the muscle alone, the surrounding fibrous layers provide a continuous structural framework. This tension-sharing function is relevant when evaluating how abdominal wall anatomy supports movement, containment, and localized changes associated with hernia assessment.
Above the arcuate line, the posterior aspect of the rectus region includes contributions from the internal oblique and transversus abdominis aponeuroses. Below it, these aponeuroses pass anteriorly, so the rectus lies against the transversalis fascia. The change is therefore a shift in the tissue layers behind the muscle, not simply a change in muscle position.
It provides a recognizable tissue plane and a landmark for understanding the layered anterior abdominal wall. Surgeons can use the relationship between the rectus muscle, aponeurotic layers, arcuate line, and transversalis fascia to orient themselves during abdominal procedures. This anatomical awareness supports more accurate identification of structures and interpretation of regional changes encountered during surgery.
Hernia assessment depends partly on understanding how the abdominal wall is layered and supported in different regions. The posterior rectus sheath helps define those regional relationships, particularly the transition at the arcuate line. Identifying whether a finding lies above or below that landmark can clarify the relevant tissue planes and improve anatomical interpretation of the abdominal wall.
The layered relationships around the rectus abdominis create anatomical planes that can be recognized during imaging and considered in regional anesthetic approaches. The arcuate line is especially relevant because the tissues behind the muscle differ on either side of it. Understanding these variations helps clinicians relate an observed or targeted plane to the underlying abdominal wall anatomy.