Posterior View – Anterolateral Abdominal Wall

by James Pickering, PhD

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    00:01 Again, we are looking at this region here on the screen and what we are going to do is we are going to climb into the abdomen and then look forwards to the inside wall of the anterolateral abdominal wall. And that?s all we can see. This is the lateral aspect around here and we can see the various muscle layers that have been cut through. What muscle do we know about that runs transversely? Well, this muscle is transversus abdominis.

    00:27 And we know that these muscles end in an aponeurosis which we can see here, this slightly lighter coloured membrane. We can see we have got the umbilicus here and we can importantly see the arcuate line here. This is where we have lots of membrane lying posterior to rectus abdominis. And then all of a sudden, it stops and then the only structure we have behind rectus abdominis is transversalis fascia.

    00:59 So, we are looking forward. We are standing where the intestines would be and we are looking forward and we are seeing the arcuate line here. We are seeing the arcuate line.

    01:13 We can see this close up. We can see the arcuate line is here. This is rectus abdominis muscle and these are the posterior layers of transversus abdominis aponeurosis. And as rectus abdominis is pierced through them, we can now see the muscle fibers. Importantly, we can see some blood vessels. We have got our inferior and superior epigastric blood vessels that are supplying this region, these superior, I am sorry, these inferior epigastric arteries and veins are running up through the rectus sheath to supply with oxygenated blood and removes the deoxygenated blood. And we can also see some important landmarks which we will come back to.

    About the Lecture

    The lecture Posterior View – Anterolateral Abdominal Wall by James Pickering, PhD is from the course Abdomen.

    Included Quiz Questions

    1. Internal thoracic
    2. Subclavian
    3. Musculophrenic
    4. Inferior epigastric

    Author of lecture Posterior View – Anterolateral Abdominal Wall

     James Pickering, PhD

    James Pickering, PhD

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