This video is going to cover the anatomy of the eye. Your eye is going to be controlled by six extrinsic skeletal muscles. This means that they are controlled by the somatic nervous system. The muscles are going to be broken into two groups, rectus and obliques.
So here is an anterior view of the eye. On top of the eye, where you're going to have the superior rectus. Rectus means it runs parallel with the midline.
So we have superior rectus. Underneath it, it's a little hard to see, we have the inferior rectus, medial rectus, and lateral rectus. Now along with the rectus muscles you are going to have oblique muscles. Oblique means they're going to run at an angle. So on top of the eye we're going to see a tendon to the superior oblique.
The superior oblique muscle is going to run at an angle medially before it loops back. So when we look at this tendon, the tendon is always going to run medially, which tells us that this is the medial rectus. So superior oblique. superior rectus. Since the superior oblique runs medially, this is the medial rectus.
Now if I turn it just slightly and we see the lateral rectus right here, we'll see right on the back of it we are going to have the inferior oblique. The inferior oblique is going to start on the lateral side and then run. These six muscles are controlled by three different cranial nerves. There's a little trick.
LR6, so lateral rectus, is controlled by abducens, cranial nerve six. So LR6, SO4, superior oblique, is controlled by the trochlear cranial nerve. And then O3, oculomotor, is going to control all the other cranial, I'm sorry, all the other muscles. So LR6, lateral rectus abducens, SO4, superior oblique trochlear, and then the oculomotor is going to control superior rectus, medial rectus, inferior rectus, and inferior oblique, which is running at this angle.