Rectus sheath
| Rectus sheath | |
|---|---|
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| Details | |
| Identifiers | |
| Latin | vagina musculi recti abdominis |
| TA | A04.5.01.003 |
| FMA | 9587 |
|
Anatomical terminology
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The rectus sheath is formed by the aponeuroses of the transverse abdominal and the . It contains the rectus abdominis and pyramidalis muscles.
It can be divided into anterior and posterior laminae.
The arrangement of the layers has important variations at different locations in the body.
For context, above the sheath are the following two layers:
Within the sheath, the layers vary:
Below the sheath are the following three layers:
The rectus, in the situation where its sheath is deficient below, is separated from the peritoneum only by the transversalis fascia, in contrast to the upper layers, where part of the internal oblique also runs beneath the rectus. Because of the thinner layers below, this region is more susceptible to herniation.
Since the tendons of the internal oblique and transversus abdominus only reach as high as the costal margin, it follows that above this level the sheath of the rectus is deficient behind, the muscle resting directly on the cartilages of the ribs, and being covered only by the tendons of the external obliques.
The Cremaster
The interfoveolar ligament, seen from in front.
This article incorporates text in the public domain from the 20th edition of Gray's Anatomy (1918)
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