Transversus Abdominis – Anterolateral Abdominal Wall

by James Pickering, PhD

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    00:00 The final muscle I want to talk about deep internal oblique is transversus abdominis.

    00:07 And as its name suggests, transversus abdominis runs transversely like the belt running across your abdomen. And here you can see, we have got numerous muscles that have been reflected, so, here we have got transversus abdominis. See its fibers running transversely. We can see them here. Again, it?s going to go and attach to the linea alba. Here we can see the details on the screen. It?s running to the midline, linea alba where it attaches, where its aponeurosis attaches and it originates from some ribs which we can see the thoracolumbar fascia once again and importantly, the lateral third of the inguinal ligament. So, here we have got the origins and the insertions. Nerve supply, again, is very similar, T6 through to T12, these thoracoabdominal and subcostal nerves and we can see these nerves are going to be running importantly in the space between transversus abdominis and internal oblique.

    01:05 So, we have external oblique and we have internal oblique transversus abdominis. And the nerves, these thoracoabdominal and subcostal nerves that are coming around run in between these two muscles, internal oblique, transversus abdominis, that?s where the nerves will be located. Similar functions to the other muscles I have described, helps to move the trunk, helps to compress and support the internal viscera. So, these three muscles, external, internal oblique and transversus abdominis, ultimately go and insert into the linea alba. They have an attachment in the midline. And they do this by way of aponeurosis.

    About the Lecture

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

    Included Quiz Questions

    1. Thoraco-abdominal and subcostal nerves
    2. Celiac nerves
    3. Superior mesenteric nerves
    4. Subphrenic nerves
    5. Inferior abdominal nerves

    Author of lecture Transversus Abdominis – Anterolateral Abdominal Wall

     James Pickering, PhD

    James Pickering, PhD

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