 Having said that, there are a few other structures which I would like to draw your attention to. First thing, take a look at this structure here. And I think all of you have guessed it. And I dissected out the full length of it which I mentioned in the class today. What is this? This is the long syphilis vein which I mentioned. It starts on the medial marginal vein of the foot. And you can see it's starting from the medial marginal vein of the foot. It is a superficial. It runs in the superficial fascia. It runs anterior to the medial malulus. It runs on the medial side of the foot. It runs one palm width behind the knee joint. And you can see it running here. And then it runs on the medial side of the thigh. It goes up. And you can see it is entering into the femoral vein here. So this is the course of the long syphilis vein in its entirety. And I have told you the clinical significance. It is used for any section. It is used for harvesting for CABG. Because the long syphilis vein is a very important vein. It is a superficial vein running on the medial side of the leg and the foot. I have decided to show it again using another camera from the medial side. It starts as the medial marginal vein of the foot. It runs just anterior to the medial malulus. It runs on the medial side of the leg. It receives plenty of tributaries on its way. And it goes one palm width behind the knee joint. It runs on the medial side of the leg thigh. It goes through the syphilis opening. It pierces the cryptiform fascia and opens into the femoral vein. This is the vein which is prone to varicositis, the so-called varicose veins. And that is most prominently seen on the medial side of the leg. It is also used for CABG and many sections. Since we mentioned the long syphilis vein, I would like to draw your attention to this nerve here. Part of it is seen here. You can see this nerve is emerging through the adapter canal. Guess what this nerve is? This is the syphilis nerve. The longest cutaneous nerve and the longest cutaneous branch of the femoral nerve. This also runs with the long syphilis vein and it supplies the skin of the anterior medial side of the leg with the leg and the medial side of the foot. So that's the second structure I wanted to show you. This is a view of the same syphilis nerve from the medial side because it's much more easily visible. It's coming out through the adapter canal and it runs on the medial side of the leg and it accompanies the long syphilis vein. Now here again there is a clinical correlation. When we do some surgical interference with the long syphilis vein we can produce irritation of the nerve and lead to neuropathic pain. The third thing I wanted to show you was what I had mentioned in the class called the pest and syrinus. If you remember the goose foot. This is the sartorius. Can you see here? Can you see the insertion of the sartorius here? I have exposed it here. You can see the insertion of the sartorius here. Now what I'll do? I'm going to lift up the next muscle of the goose foot that is the gracilis here. Can you see the insertion of the gracilis here? You have to come to the medial side to see it more clearly. And the third muscle of the insertion was the sartorius gracilis and the semi-tendinosis here. So this is the semi-tendinosis. So let me show you again. Sartorius, the gracilis and the semi-tendinosis. Sartorius belongs to the anterior compartment of the thigh. Gracilis belongs to the medial compartment of the thigh. And the semi-tendinosis belongs to the posterior compartment of the thigh. All three of them are inserting onto the upper medial aspect of the tibia and forming the insertion known as the goose foot insertion, which you can see very clearly from that side. What is the functional significance of these three which I'm holding up? Sartorius, gracilis, semi-tendinosis. Semi-tendinosis actually belongs to the posterior compartment. I've pulled it to the front. These three together act as the counterpart or the counter to this structure here. This is the iliotibial tract. The iliotibial tract gets inserted onto the antrilateral tubercula of Giordi, which is here. And the pull of the iliotibial tract on the lateral side is countered by the pull of these three structures and the best ancerinas on the medial side. That's the next point I wanted to show you. Best ancerinas. If you remember the goose foot, this is the sartorius. Can you see here? Can you see the insertion of the sartorius here? I've exposed it here. You can see the insertion of the sartorius here. Now what I'll do, I'm going to lift up the next muscle of the goose foot that is the gracilis here. Can you see the insertion of the gracilis here? You have to come to the medial side to see it more clearly. And the third muscle of the insertion was the sartorius gracilis and the semi-tendinosis here. So this is the semi-tendinosis. So let me show you again. Sartorius, the gracilis, and the semi-tendinosis. Sartorius belongs to the anterior compartment of the thigh. Gracilis belongs to the medial compartment of the thigh. And the semi-tendinosis belongs to the posterior compartment of the thigh. All three of them are inserting onto the upper medial aspect of the tibia and forming the insertion known as the goose foot insertion, which you can see very clearly from that side. The final thing which I wanted to show you in this dissection pretty much is it is not yet, we have not yet studied it, but this patient happened to have this. Can you take a look at this toe here? What do you notice? There's a severe angulation between the first metrotarsal and the phalanges of the first digit. That is a great toe. This condition is known as Halux balgus, which I am going to mention in class tomorrow. This is called Halux balgus, where there is an extreme medial angulation between the first metrotarsal bone and the digits of the great toe. Incidentally, one of those secondary conditions you can see, when this Halux balgus becomes, this happens especially when you wear pointed shoes. And one of the extreme secondary manifestations of this Halux balgus is you can have the second toe can override the first. And that is what you can see here. This is a view of the same Halux balgus from the medial side. There are many associated conditions with the Halux balgus. For example, the skin on the medial side of the toe it gets thickened, what is known as Colosity. Then there can be excessive bone formation on the medial side of the head of the medotarsal, what is known as Exostosis. And an adventures bursa can also develop under the skin, which can get inflamed, the condition being known as Bunion. Apart from these associated secondary conditions, because of this extreme angulation, the sesameoid bone which is under the head of the first medotarsal, it gets shifted. And it gets shifted further laterally with each angulation of the medotarsal phalangea joint. So these are all the associated conditions that you can get in Halux balgus. Though this is not the right section for that purpose, I have removed the fascia from the part of the posterior compartment here. Just to show you the beginning of the muscles of the posterior compartment on the prone cadaver, these are the muscles of the posterior compartment. This is the gastrocnemius here, and this is the tendocalcaneus, which I have mentioned about. So this is the gastrocnemius, this is the posterior compartment, this is the fascia of the posterior compartment, and this is the tendocalcaneus. This is the medial view of the posterior compartment just to mention to you the functional significance of the calf pump. When these calf muscles work within the tight osteoficial compartment, they help to push the venous blood up hard, and if the calf pump fails, then it leads to a condition known as deep vein thrombosis. Okay, so that's all for the section today. Thank you very much for watching. If you have any questions or comments, please put them in the comment section below. Thank you camera persons, have a nice day. Dr. Sanjay Sanyal signing out.