Rectus sheath

Rectus sheath

Infobox Anatomy
Name = PAGENAME
Latin = vagina musculi recti abdominis
GraySubject = 118
GrayPage = 416



Caption =


Caption2 =
System =
MeshName =
MeshNumber =
DorlandsPre = v_01
DorlandsSuf = 12842658
The Rectus sheath is formed by the aponeuroses of the Obliqui and Transversus. It contains the Rectus abdominis and Pyramidalis muscles.

It can be divided into anterior [Dorlands|l_02zPzhtm#12475879] and posterior [Dorlands|l_02|12476587] laminae.

The arrangement of the layers has important variations at different locations in the body.

Below the costal margin

For context, above the sheath are the following three layers:

# superficial fascia
# Camper's fascia
# Scarpa's fascia

Within the sheath, the layers vary:

Below the sheath are the following three layers:
# transversalis fascia
# extraperitoneal fat
# parietal peritoneum

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.

Above the costal margin

Since the tendons of the Obliquus internus and Transversus 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 merely by the tendon of the Obliquus externus.


=Additional

References

External links

* - "Incisions and the contents of the rectus sheath."
* - "Anterior Abdominal Wall: The Rectus Abdominis Muscle"
* - anterior layer
* - posterior layer above arcuate line
* - posterior layer above arcuate line
*
*
* - "The Rectus Sheath, Anterior View & Transverse Section"
*


Wikimedia Foundation. 2010.

Игры ⚽ Поможем написать реферат

Look at other dictionaries:

  • rectus sheath — sheath of rectus abdominis muscle vagina musculi recti abdominis …   Medical dictionary

  • Rectus sheath hematoma — Infobox Disease Name = PAGENAME Caption = DiseasesDB = ICD10 = ICD9 = ICDO = OMIM = MedlinePlus = eMedicineSubj = emerg eMedicineTopic = 943 MeshID =A rectus sheath hematoma is an accumulation of blood in the sheath of the rectus abdominis muscle …   Wikipedia

  • Arcuate line of rectus sheath — Linea semicircularis redirects here. It is not to be confused with Linea semilunaris. Arcuate line of rectus sheath The interfoveolar ligament, seen from in front. (Linea semicircularis labeled at center top.) Latin …   Wikipedia

  • Rectus abdominis muscle — Rectus abdominis The human rectus abdominis muscle. Latin musculus rectus abdominis Gray s …   Wikipedia

  • sheath — 1. Any enveloping structure, such as the membranous covering of a muscle, nerve, or blood vessel. Any sheathlike structure. SYN: vagina (1). 2. The prepuce of male animals, especially of the horse. 3. A specially designed tu …   Medical dictionary

  • arcuate line of sheath of rectus abdominis muscle — linea arcuata vaginae musculi recti abdominis …   Medical dictionary

  • Мышцы живота — По месту расположения мышцы живота (mm. abdominis) делятся на группы мышц передней, боковой и задней стенок живота. Мышцы передней стенки животаМышцы боковой стенки животаМышцы задней стенки животаФасции живот …   Атлас анатомии человека

  • List of muscles of the human body — Skeletal muscles homo sapiens Muscles of the human body: Overview Head  |  Neck  |&# …   Wikipedia

  • Muscle — is the tissue of the body which primarily functions as a source of power. There are three types of muscle in the body. Muscle which is responsible for moving extremities and external areas of the body is called "skeletal muscle." Heart… …   Medical dictionary

  • aponeurosis — A fibrous sheet or flat, expanded tendon, giving attachment to muscular fibers and serving as the means of origin or insertion of a flat muscle; it sometimes also performs the office of a fascia for other muscles. [G. the end of the muscle where… …   Medical dictionary

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”