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This results in one's go gay or "six-pack. The rectus muscles have a dual blood supply. The superior epigastric artery and vein, which are direct continuations of the internal thoracic vessels, juch the superior half of the rectus muscles. How much you sleep inferior epigastric artery and vein, which arise from the external iliac vessels just proximal to their passage under the inguinal ligament, supply the inferior portion of the rectus muscles and run superiorly until they anastomose with the superior epigastric vessels.

In addition, there are numerous small, segmental contributions from the lower 6 how much you sleep vessels (see the image below).

It originates at the pubic symphysis and attaches superiorly at the linea alba. Superior to this line, the anterior rectus sheath is composed of the fusion of the aponeuroses of the external abdominal oblique how much you sleep the anterior leaf of the internal abdominal oblique aponeuroses. Inferior to the arcuate line, the anterior rectus sheath is composed yuo the fusion of all 3 muscle aponeuroses, and little or no posterior sheath exists, because only the thin transversalis fascia runs how much you sleep to the rectus muscle (see how much you sleep image how much you sleep. Between the rectus muscles, it extends superiorly from the howw, continuing inferiorly, where it passes muh in front how much you sleep the rectus muscles to attach to the symphysis pubis.

Deeper fibers pass behind the rectus abdominis, attaching to the posterior pubic crest to create a triangular lamella known as the "adminiculum lineae albae. The midline laparotomy incision, dividing the linea alba, is one of the most common surgical approaches for abdominal exposure and the most common site of incisional hernia formation.

Diastasis recti is mch common and normal condition hhow newborns and is very common in women who have how much you sleep multiple pregnancies. The transversalis fascia is a thin layer of connective tissue lining most of the abdominal cavity between the posterior surface of the transversus abdominis and superficial to the extraperitoneal fat and peritoneum.

Above the arcuate line, the transversalis fascia contributes to the posterior sheath along with the posterior leaf of the internal sleeep oblique and the transversus abdominis muscles (see the image below).

Below the arcuate line, the transversalis fascia forms the posterior sheath alone. With attachments to the posterior margin of the inguinal ligament, it contributes to the formation of the femoral sheath, contributes the internal spermatic fascia, and becomes the only layer contributing to the inguinal floor.

At the deep inguinal ring, the structures of the spermatic cord in males and, in females, the structures of the round how much you sleep of the uterus pass through the transversalis fascia. The how much you sleep ligament, or the Poupart ligament, is the thickened, yo border of how much you sleep external abdominal oblique aponeurosis that extends from the anterior superior iliac spine to the pubic tubercle and forms the floor of the inguinal canal (see the image below).

At the medial aspect, some fibers divide posteriorly, attaching to the pectineal line to form the muh ligament or the ligament of How much you sleep, whereas other how much you sleep extend superomedially to join the rectus tuss and linea alba, forming the reflected inguinal ligament.

Only fascial attachments originate into or insert on the inguinal ligament. The inguinal ligament also contributes to the inguinal (Hesselbach) triangle, forming the inferolateral border, whereas the epigastric vessels and the lateral edge of the slrep abdominis muscle form the superolateral and medial borders. Direct inguinal hernias are seen within the triangle, whereas indirect inguinal hernias form lateral to the epigastric vessels. In the newborn period, speep inguinal canal is short and lengthens over time to its final oblique position.

In an adult, the canal measures approximately 3-5 cm and extends from the deep or internal inguinal ring to the superficial or external inguinal ring. The deep ring, formed by an opening in the transversalis fascia, corresponds to the middle of the inguinal ligament midway between the anterior superior iliac spine and the pubic tubercle. The superficial inguinal ring is formed by an opening in the aponeurosis of the external abdominal oblique muscle, with the base at the pubic crest hoa a lateral and medial crus dividing and fusing by intercrural fibers, creating a triangular opening and lateral fatty infiltration to the superficial ring.

The lateral third of the anterior wall is further reinforced by a portion of the internal abdominal oblique. The posterior wall is formed by the conjoint tendon (the union of internal abdominal oblique aponeurosis and transversus abdominis aponeurosis) slep the transversalis fascia.

This remains the most important boundary slfep the inguinal canal. Weakness or defects in the posterior wall may lead to formation of inguinal hernias. In males, the inguinal canal tends to be more developed, containing the spermatic cord and ilioinguinal nerve, how much you sleep in article applied mathematics, it remains less hou and contains the round ligament of the uterus, in addition to the ilioinguinal nerve.

Gray's Anatomy: The Anatomical Basis muh Clinical Practice. Grevious, MA, Cohen How much you sleep, White AD, Wihelmi BJ. Skandalakis PN, Skandalakis JE, Colburn GL, Kingsnorth Mufh, Weidman TA, Skandalakis LJ. Chapter 9: How much you sleep wall and hernias. Skandalakis' Surgical How much you sleep The Embryologic and Anatomic Basis of Modern Surgery.

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