Now, let's transitioned to the arterial supply to the abdominal wall.
This slide is demonstrating two arteries that run on a deep aspect of the rectus abdominis.
These are epigastric arteries.
The first one is located right here and you can see the rectus abdominis right along here.
This is the superior epigastric artery.
It is a branch of a thoracic artery called the internal thoracic that we see here along the lateral margin of sternum.
At this point, that internal thoracic branches into a musculophrenic
and then a more medial branch is directed vertically into the abdominal region to help supply the rectus abdominis.
Another deep epigastric artery is referred to as the inferior epigastric artery.
We see it coursing upwards along the deep surface of the rectus abdominis.
The source of the inferior epigastric artery is your external iliac artery that is labeled right at this particular point.
Then the two epigastric arteries will anastomose within the substance of the rectus abdominis.
We also have some additional arteries that supply the abdominal wall.
Three of these are listed on the slide: superficial circumflex iliac artery, the deep circumflex iliac artery,
as well as the superficial epigastric. So let's take a moment to identify those particular vessels.
Here we have our external iliac and then on a deep aspect here, running along the ilium is the deep circumflex iliac artery.
The external iliac then will pass deep to the inguinal ligament which we see here and it will enter the femoral triangle.
As it enters the femoral triangle, we will refer to this artery as the femoral artery.
It will give rise to a superficial circumflex iliac that we see branching off at this point
and will run more superficially in this general vicinity.
This branch that we see here is also issuing from the femoral artery.
This is the superficial epigastric artery and it will have a subcutaneous course on the interior abdominal wall.
Please bear in mind that this is not an exhaustive list of arteries that supply the abdominal wall.
We have some others as well.
For example, we would have four pairs of lumbar arteries that would issue from the aorta above here.
That would travel on the posterior abdominal wall and then start to follow the lateral aspects of the wall
and start to anastomose to some of these other vessels.
We also have an ilial lumbar artery which we see coursing up vertically along the sacrum.
This is issuing from the internal iliac that we see here
and we certainly would have some other contributing blood vessels that would help supply the abdomen wall.