Editing Abdominal Wall (section)

=== Abdominal musculature ===
* '''<span style="color:#ff0000">Deep to Scarpa fascia</span>'''
* '''<span style="color:#ff0000">Laterally, there are the external oblique, internal oblique, and transversus abdominis muscles; medially, there are the rectus abdominis and pyramidalis muscles.</span>'''
* '''<span style="color:#ff0000">Laterally</span>'''
** '''<span style="color:#ff0000">Superficial to deep:</span>'''
*** '''<span style="color:#ff0000">External oblique</span>'''
*** '''<span style="color:#ff0000">Internal oblique</span>'''
*** '''<span style="color:#ff0000">Transversus abdominis</span>'''
** '''<span style="color:#ff0000">The external oblique, internal oblique, and transversus abdominis muscles terminate on the anterior abdominal wall as broad, tough aponeurotic sheets that fuse in the midline (linea alba) and form the anterior and posterior rectus sheaths</span>'''
** '''<span style="color:#ff0000">The arcuate line/linea semicircularisis 2/3 of the distance between the pubis and the umbilicus</span>'''
*** '''<span style="color:#ff0000">Above the arcuate line:</span>'''
**** '''<span style="color:#ff0000">The anterior rectus sheath is formed by the aponeurosis of the external oblique muscle and a portion of the internal oblique muscle</span>'''
**** '''<span style="color:#ff0000">The posterior sheath is derived from the remaining internal oblique aponeurosis and the transversus abdominis aponeurosis</span>'''
*** '''<span style="color:#ff0000">Below the arcuate line:</span>'''
**** '''<span style="color:#ff0000">The anterior rectus sheath is formed by the aponeurosis of all the muscle layers</span>'''
**** '''<span style="color:#ff0000">The posterior sheath is absent; directly posterior to the rectus abdominus is transversalis fascia then peritoneum.</span>'''
* '''<span style="color:#ff0000">Medially</span>'''
** '''<span style="color:#ff0000">The linea alba is avascular and is a convenient point of access to the peritoneal and extra-peritoneal pelvic cavities.</span>'''
** '''<span style="color:#ff0000">Rectus abdominis</span>'''
*** Arises from the pubis medial to the pubic tubercle and inserts on the xiphoid process and adjacent costal cartilages
*** Tendinous intersections connect it to anterior rectus sheath so rectus can be divided transversely without retracting
*** Innervated by T6-12
** '''<span style="color:#ff0000">Pyramidalis</span>'''
*** Arises from the pubic crest and inserts into the linea alba
*** '''<span style="color:#ff0000">Anterior to the rectus and within its sheath</span>'''
*** Triangle-shaped muscle
*** Innervated by T12