 Now let's take a look at the nerves neuro vascular structures. Again, let's come back to our pyriformis. So this is again where my finger is non-air. This is the, my finger is non-air to the pelvis. And this is the suprapyriformis compartment. This is the pyriformis compartment. So coming out from above in the suprapyriformis compartment, we have these neuro vascular structures which I have lifted up with my experiment. All these were actually supplying the deep surface with gluteus maximus and we can see the cut portions. I have to cut them to reflect the gluteus maximus. These are all branches of the superior gluteal artery. Superior gluteal artery is arising from the pelvis from a branch of the internal area. What about the superior gluteal nerve? Superior gluteal nerve supplies the gluteus medius, gluteus minimus, and the tensor patient. This is a very important nerve and this nerve is likely to be injured in stab injury of the buttock. And that produces paralysis. The gluteus medius leading to what is known as trend in both sides. When the pelvis sags down, when the person stands on the paralyzed side, the opposite pelvis sags down. And that produces one of three types of gait, namely either a rattling gait or an out swinging gait or a high-stage gait. And that is seen in gluteus medius paralysis caused by injury to the superior gluteal nerve. So where is the superior gluteal nerve? This is the superior gluteal nerve. I have lifted it up here. We can see it is giving numerous branches to the gluteus medius. And it is also giving a branch to the gluteus minimus. We can see it here. And if you trace very closely, we find that one branch is going deep inside and it will go and supply the cancer patient. So this is the superior gluteal nerve, L5S1 posterior grafts. This is a very clinically very important nerve. So this is also coming out from the suprapine for this compartment along with the superior gluteal vessels. This is the superior gluteal nerve. Now let's come to the infrapyrochemism compartment that is below the pyrochemist. I showed you the cut portion of the inferior gluteal nerve which supplies the gluteus maximus. Other cut portion of the inferior gluteal nerve is this one here. This is the other cut portion of the inferior gluteal nerve which was attached here. So the inferior gluteal nerve comes out through the infrapyrochemism compartment. This is S1S2 which supplies the gluteus maximus. This can be insured but not as commonly as the superior gluteal, in which case the gluteus maximus paralysis. Now let's take a look at the next structure which is coming out from the infrapyrochemism compartment. And I showed you the pneumonia. This big nerve that we see here. This is the shining nerve. And we are lucky enough to see the two components of the shining nerve here. We can see the pre-axial and the post-axial components. Normally the pre and the post-axial components, they unite inside the appendage. But here we are seeing it. But the point to be noted is that the shining nerve is coming out in the infrapyrochemism compartment. It is coming out below the pyrochemist. And this is the whole shining nerve. This is the largest nerve in the human body. And as it is coming out below the pyrochemist, it can get entrapped here. Especially if a person gets knee-jewed on the pyrochemist. The pyrochemist swells up and you can compress the shining nerve to receive what is known as pyrophobic syndrome. In which case it may be necessary to inject Botox injection into the pyrochemist or cut the tendon of the pyrochemist to relieve the pressure. The shining nerve is so big that it receives its own arterial supply. And again we are lucky enough to see its own arterial supply. This arterial supply comes from the infrapyrochemism compartment. This is called the artery to the shining nerve and you can see that here. The shining nerve then runs down between the greater trochanter and the ischiotibrosity. It runs exactly midway between the two. And here this is a place where it can under constant friction with the ischiotibrosity especially in joggers. Shooting pain, electric shock pain, the back of the thigh, back of the leg, up to the foot. That is shining. This is also a site which can be used for shining nerve block. And we can use the upper border of the pyrochemist as a landmark. This is the region of the posterior superior iliac spine and this is the greater trochanter. If we draw an imaginary line, it closely matches the upper border of the pyrochemist. And if we go one deep to that, we can engage the ischiotibrosity and the greater trochanter. Or we can feel the ischiotibrosity and the greater trochanter. And again draw them, join them with the line and the midpoint of that line will be the site for shining nerve block. And we can see that here. The shining nerve descends down on top of the deep gluteal muscles. And we can see it is descending from the superior geminis, up to the internal tendon, inferior geminis, and what it is famous. And then it comes into the posterior aspect of the thigh. And then it runs. So the shining nerve is running between the superficial gluteal muscle namely the gluteus maximus and the deep gluteal muscles which I mentioned just now. And once it enters the thigh, it runs between the layers of the hamstring muscles and the further pores of it will be described in the thigh. The shining nerve is the most important in the nerve and the largest nerve and it supplies all the muscles from the posterior compartment of the thigh and all the muscles in the posterior compartment of the leg and right of the foot. Now let me mention yet one more structure which is very significant. Again let's come back to this structure here. This is the largest and the toughest ligament in the human body and that is the sacro tuberous ligament. It is extending from the sacrum to the exterior tuberosity. This is the sacro tuberous ligament. In fact the gluteus maximus is partly attached to that. If I put my instrument under that, this space is the sacrospinus ligament. This is where my index finger is located. Again let's take a look at the intrapirate formus compartment. We can see another neurovascular structure which I have lifted up here. And follow me very closely when I give traction here on this neurovascular structure it is pulling here. This is a nerve which I have not mentioned earlier. This is a pudendal nerve and the internal pudendal artery. These structures also come out from the intrapirate formus compartment. They go from the pelvis through the intrapirate formus compartment. Then they go over the ischial spine and then they go through the lesser sciatic foramen. And they enter this space here. This fascia over the operated internus is called the operative internus fascia which I have lifted up. And again when I exert traction we can see it is coming here. This pudendal nerve is actually a nerve of the pelvis and the perineum. But it runs in a canal inside the obturator fascia and that canal is called the alcox of the pudendal canal. We will not talk any further about this nerve because it is a nerve essentially of the pelvis and the perineum. The reason I mentioned it here is because to show there are three sets of structures which are coming out from the intrapirate formus compartment. And we shall name them from lateral to medial as SGP. S stands for sciatic nerve. G stands for gluteal, inferior gluteal nerve with accompanying artery of course, inferior gluteal artery which also is a branch of internal iliac. And P standing for pudendal nerve and internal pudendal artery which enters the perineum through the alcox canal or the pudendal canal and goes to the perineum. So these are the three sets of structures which are coming from intrapirate formus compartment as opposed to only one set of structure coming out through the suprapirate formus compartment. So these are all the things which I wanted to mention in the gluteal region. If you have any questions or comments put them in the comment section below. Thank you for watching.