Posted by ESB on August 28, 2011 at 16:09:54:
In Reply to: Re: Questions for the Abdominal Wall posted by MGF on August 28, 2011 at 00:36:16:
: Answer to Questions for the Abdominal Wall
: True/False - August 23, 2011 (selection limited by earthquake)
: 1. The paraumbilical veins communicate with lateral thoracic vein and, thus, contribute to a portacaval shunt.
: True—unsure of reasoning
I think in this case, the words "shunt" and "anastemosis" are being used as synonyms for the venous connection between the portal system and the systemic system provided by the paraumbilical veins.
: 5. The umbilicus A/P projection is to the T10 vertebra and the cutaneous innervation is by the L3 spinal nerve.
: False-the A/P projection IS to the T10 vertebra BUT the cutaneous innervation is by the T10 spinal nerve
Pretty sure the projection is to the L3 vertebra. Maybe L4. Either way, it's well below T10.
: 7. The arcuate line is a feature of the anterior lamina of the rectus sheath that occurs 3/4 of the way inferior along the sheath.
: True
I think this is actually false - the arcuate line is a landmark in the posterior rectus sheath.
: 11. The inferior epigastric artery enters the rectus sheath at a location inferior to the arcuate line.
: False-the inferior epigastric artery is deep to the rectus abdominis muscles and the posterior rectus is only present above the arcuate line. Therefore, the inferior epigastric vein cannot enter the rectus sheath below the arcuate line.
There're strange semantics involved in this question. The inferior epigastric artery runs superiorly on the posterior side of the body of the rectus abdominis from a point below the arcuate line. It enters the rectus sheath at the arcuate line, piercing the posterior layer at the point where it begins. In order to convincingly argue it as either true or false, I think I'd end up resorting to some nasty topological space arguments.
: 12. Stability of the vertebral column is enhanced by well toned abdominal oblique muscles due to increased intraabdominal pressure.
: True—unsure of exact reasoning
Maybe because the force of gravity is trying to increase the arc length of the lumbar curvature, and the pressure of the abdominal contents outward resists the inward pressure of vertebral column caused by gravity? I'm sure there's a better way of saying that...
: 15. The superficial epigastric artery is a branch of the femoral artery.
: False—it is a branch of the internal thoracic artery
T - it is a branch of the femoral artery. The *superior* epigastric artery is a branch of the internal thoracic.