Fascia and muscle arrangement
What does the extraperitoneal fascia separate?
What is the viscera referred to?
It separates the transversalis fascia from the peritoneum
retroperitoneal
What is the origin of the external oblique muscle?
Muscular slips (from the outer surface of the lower ribs V to XII)
What is the superior part of the wall supplied by?
The musculophrenic artery (which is the terminal branch of the internal thoracic artery)
What do nerves T7 to T9 supply?
The skin from the xiphoid process to just above the umbilicus
Outline the 9 region pattern of the abdominal wall.
Subcostal plane: R hypochondriac , R lumbar R illiac
Midclavicular planes: Medial-epigastic,umbilical,hypogastric
lateral- L hypochondriac, L lumbar, L iliac
What are the two types of superficial fascia and their characteristics?
(Camper's fascia)The superficial fatty layer of superficial fascia.contains fat and varies in thickness. is continuous over the inguinal ligament with the superficial fascia of the thigh and with a similar layer in the perineum.
Scarpa's fascia-The deeper membranous layer of superficial fascia. Is thin and membranous, and contains little or no fat. Inferiorly, it continues into the thigh, but just below the inguinal ligament, it fuses with the deep fascia of the thigh
Which abdominal muscle's aponeurosis is continuous with the inguinal ligament?
What is the inferior part of the abdominal wall supplied by?
The superficial epigastric artery (medially) and the superficial circumflex iliac artery (laterally)
Where is the superficial drainage of the abdominal wall?
Axillary nodes
Superficial inguinal and lumbar nodes
Label the Rectus Sheath
on powerpoint
What are the 3 flat muscles in the anterolateral group of abdominal wall muscle?
Three flat muscles —the external oblique, internal oblique, and transversus abdominis muscles;
What muscles work to compress the abdominal contents?
External abdominal oblique, Internal abdominal oblique, Transversus abdominus, and rectus abdominis
How would arterial blood flow in the case of an abdominal aortic obstruction?
Anastamosis from the superior epigastric to the inferior epigastric artery would allow blood to bypass the blockage and get to the external iliac arteries
Where is the deep drainage of the abdominal wall?
Parasternal
Illiac lumbar nodes
What superficial landmark is directly lateral to the rectus abdominis?
linea semilunaris
What are the two vertical muscles in the anterolateral group of abdominal wall muscles?
two vertical muscles- the rectus abdominis and pyramidalis muscles.
What is the function of the pyrimidalis muscle?
To tense the linea alba
Describe venous drainage from the left quadrant of the anterior abdominal wall in case of an IVC blockage
Through the thoracoepigastric vein to the SVC
What 2 nerves from L1 innervate the internal abdominal oblique and the transversus abdominis?
The iliohypogastric nerve and the ilioinguinal nerve
What do the intercostal nerves become when they enter the abdominal wall and what 2 muscles do they travel in between?
thoracoabdominal nerves and they pass in between the internal abdominal oblique and the transversus abdominis