Linea alba (abdomen)

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Linea alba
Diagram of sheath of Rectus.
The Obliquus externus abdominis.
Gray's	subject #118 417
Dorlands/Elsevier	l_10/12496016

The linea alba is a fibrous structure that runs down the midline of the abdomen in humans and other vertebrates. The name means white line and the linea alba is indeed white, being composed mostly of collagen connective tissue.

It is formed by the fusion of the aponeuroses of the abdominal muscles, and it separates the left and right rectus abdominis muscles. In muscular individuals its presence can be seen on the skin, forming the depression between the left and right halves of a "six pack."

Because it consists of only connective tissue, and doesn't contain important nerves or blood vessels, a median incision through the linea alba is a common surgical approach.

[edit] Additional images

Surface anatomy of the front of the thorax and abdomen.

[edit] External links

• -140902323 at GPnotebook
• Norman/Georgetown skel&wallsabd
• SUNY Labs 35:os-0108 (before removing skin)
• SUNY Labs 35:06-0101 (after removing skin)
• Roche Lexicon - illustrated navigator, at Elsevier 03281.000-2

v • d • e General anatomy of torso Thorax/ Thoracic cavity Mediastinum (Superior, Anterior, Middle, Posterior) • Superior thoracic aperture • Inferior thoracic aperture • Triangle of auscultation • Intercostal space • Thoracic plane • Thoracic wall/Thoracic cage - fascia (Pectoral fascia, Clavipectoral fascia, Thoracolumbar fascia) • Chest • Midsternal line Thoracic diaphragm openings (Caval opening, Esophageal hiatus, Aortic hiatus, Foramina of Morgagni) • Central tendon • Crus of diaphragm • arcuate ligaments (Lateral, Medial, Median) Abdomen/ Abdominal cavity Retroperitoneum • Paracolic gutters • Hepatobiliary triangle anterior abdominal wall (Arcuate line, Linea alba, Tendinous intersection, Linea semilunaris, McBurney's point, Traube's space, Inguinal triangle) • Inguinal canal (Deep inguinal ring, Superficial inguinal ring, Intercrural fibers, Crura of superficial inguinal ring) • Lumbar triangle • regions (Epigastrium, Hypochondrium, Umbilical region, Latus, Hypogastrium, Inguinal region) • planes (Transpyloric plane, Intertubercular plane, Midclavicular line) fascia (Fascia of Camper, Fascia of Scarpa, Transversalis fascia, Renal fascia, Rectus sheath) Pelvis/ Pelvic cavity Pelvic floor • Retropubic space fascia (Pelvic fascia, Superior fascia of diaphragm of pelvis, Inferior fascia of diaphragm of pelvis, Fascia of the Obturator internus, Tendinous arch, Iliac fascia, Iliopectineal fascia) Perineum Anal triangle (Ischioanal fossa, Pudendal canal, Anococcygeal raphe) Urogenital triangle (Superficial perineal pouch, Deep perineal pouch) Perineal body fascia (Dartos/fascia of perineum/superficial perineal fascia/Fascia of Colles, Perineal membrane/"Inferior fascia of UGD", "Superior fascia of UGD")