00:01 Let's move on and deep to this muscle, deep to external oblique, we find internal oblique. 00:08 So here on the diagram, we can see external oblique here has been cut away, and we're left with this muscle that's radiating underneath. 00:16 So here we have some details. 00:18 You can notice that the fibers of internal oblique run in the opposite direction to that of external oblique, and this is really important. 00:28 So external oblique is running down in this direction, like you're putting your hands in your pockets, external oblique. 00:35 We've got some details of its origin and its insertion here. 00:40 It originates from the iliac crest from the pelvic bone and also an important piece of fascia most posteriorly called thoracolumbar fascia. 00:50 It also attaches to the inguinal ligament, and we'll see that in more detail when we look at the inguinal canal. 00:57 As it's running up in this direction, we can see an insert into ribs 10 and 12. 01:02 And also lies some aponeurosis, which we'll talk about the internal oblique muscles attached to the linea alba. 01:11 Nerve supply again is similar to external oblique and rectus abdominis. 01:15 And it's the thoraco-abdominal nerves coming from the spinal cord T6 through to T12. 01:22 Internal oblique does the same function as external oblique, it helps to flex and rotate the trunk enabling us to move and importantly like I mentioned before, it helps to compress the internal viscera, increase the pressure and support the abdominal cavity. 01:38 So we've got internal oblique that lies deep to external oblique.
The lecture Internal Oblique – Anterolateral Abdominal Wall by James Pickering, PhD is from the course Abdomen.
Where does the internal oblique muscle originate?
Which statement best describes the internal oblique muscle?
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