Abdominal pelvic: Abdominal walls and inguinal canal

by Craig Canby, PhD

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    Welcome to this lecture on “The Abdominal Wall”. This slide lists the objectives that you should be able to answer at the conclusion of this presentation. First, list the muscles of the anterolateral and posterior abdominal walls. Describe the attachments, innervation and action for each muscle. Describe the rectus sheath and how the arcuate line is formed. Describe the arterial supply to the abdominal wall. Describe the anatomy of the inguinal canal. Define the boundaries of the inguinal triangle. And lastly, anatomically distinguish a direct from an indirect inguinal hernia. And then we will proceed to the summary slide and identify the important take-home messages. And then lastly, provide attribution for the images that were used throughout this presentation. We will stop momentarily here to point you out on the body map our area of attention or focus. Here is the anterior abdominal wall. So, we will be looking at this region of the body, outwards here laterally, and then we will also want to take a look at the posterior abdominal wall as well. This slide depicts the muscles of the anterolateral abdominal wall. These muscles consist of three pair of flat muscles and then we have two pairs of vertically oriented muscles. The flat muscles are the external abdominal oblique, the internal abdominal oblique, the transversus abdominis, and then our two vertically oriented muscles would be the rectus abdominis and then, a very small pyramidalis. And again, all these muscles listed here are paired, so we have right and left muscles. Let’s take a moment to look at each one of these muscles individually and when we do so, our interest here will be on describing the attachments of the muscles, their innervation and their actions. So, our first stop will be the external abdominal oblique and I...

    About the Lecture

    The lecture Abdominal pelvic: Abdominal walls and inguinal canal by Craig Canby, PhD is from the course Abdominal Wall. It contains the following chapters:

    • Muscles of the anterolateral abdominal wall
    • Muscles of the posterior abdominal wall
    • Arterial supply to the abdominal wall
    • Innervation
    • Inguinal canal

    Included Quiz Questions

    1. T7-T12 plus L1
    2. T7-T12
    3. T6-T10
    4. T8-L2
    5. T8-L3
    1. compression of abdominal contents.
    2. rotation of the abdominal wall to the same side.
    3. extension of the vertebral column.
    4. rotation to the opposite side.
    1. Quadratus lumborum muscle
    2. Psoas major muscle
    3. Psoas minor muscle
    4. Iliacus muscle
    1. External iliac artery
    2. Femoral artery
    3. Internal thoracic artery
    4. Aorta
    5. Internal iliac artery
    1. T10
    2. T8
    3. T9
    4. T11
    5. T12
    1. Transversus abdominis muscle
    2. Rectus abdominis muscle
    3. Inguinal ligament
    4. Inferior epigastric vessels

    Author of lecture Abdominal pelvic: Abdominal walls and inguinal canal

     Craig Canby, PhD

    Craig Canby, PhD

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