anterior abdominal wall Flashcards
What is the midline dent on surface anatomy called? Caused by?
Linea alba. Caused by deep connective tissue
What is the surface anatomy midsagittal line called (parallel to linea alba)?
Linea semilunaris; separates obliques and ab muscles
What is and where is the rectus abdominis?
Tendinous intersections causing bulging in abdomen to make a 6 pack
What is ASIS?
What is AIIS?
Anterior superior iliac spine
Anterior inferior iliac spine
L1 is what plane
transpuloric
L2 is what plane? what marker?
subcostal plane for gallbladder
L4 is what plane? marking for what?
transumbilical or supracristal aka belly button; marks where anterior inferior iliac spine
S1 or S2 is what plane? marker for what organ?
transtubercular plane, appendix
Name the layers of abdominal wall from superficial to deepest
Skin, campers fascia (fat), scarpa fascia (thin membranous), external oblique, internal oblique, transverse abdominis, transversalis facsia, extraperitoneal fat (various levels of fat), parietal peritoneum
Where is interspinous plane?
Between ASIS and S2/S3
What is the inferior border of abdomen?
inguinal ligament
What is the external oblique aponeurosis?
Connects external oblique muscle to linea alba
External oblique muscles fibers follow the same direction as what other muscles?
External intercostal, all externals are directed inferiorly and medially
What direction do internal oblique and internal intercostal muscle fibers go?
Superiorly and medially
What is unique about the internal oblique apeurosis?
It splits into anterior and posterior sheaths that encircle the rectus abdominus
