 This is going to be a demonstration of the structures in the lower one-third of the thigh and around the knee So let's start off with this structure, which I have lifted up here. This is the combined insertion of the quadriceps muscle So this where my thumb is located. This is the quadriceps tendon It's a very powerful tendon and it's inserted onto the base of the medulla here The quadriceps tendon is the combined tendon of insertion of the four muscles of the quadriceps, namely the rectus femoris The vastus lateralis I've lifted up with my finger here Then under the rectus femoris we have this. This is the vastus intermedius And I have lifted up the vastus medialis. So all these four tendons they fuse at the quadriceps tendon Apart from that the vastus medialis Gives an aponeurotic expansion and I have lifted up here with my finger This aponeurotic expansion gets attached to the side of the patella and to the condyle of the tibia So this is known as the medial patella red necrolum Likewise the vastus lateralis also does the same thing It gives an aponeurotic expansion and my finger has lifted it up here It continues down and it gets attached to the side of the patella and to the tibial condyle So this is the lateral patella red necrolum There is a thin aponeurotic sheet which we have removed which goes over the patella and it continues down And it merges with this strong tendon that we have lifted up here this is the ligamentum patellae, the patella ligament, which extends from the apex of the patella to the tibia tigrosity So therefore in effect the quadriceps tendon is Continuous with the patella ligament, with the patella inserted in between the two lycosesamide bone The purpose of the patella is to alter the direction of pull and increase the mechanical advantage of extension of the knee The next structure which I would like to draw your attention to is the Continuation and the termination of the adductor canal. So this was the beginning of the adductor canal Where the sartorius overlapped the adductor longus So this is the sartorius, this is the adductor longus. So the adductor canal began here and So 15 centimeter long canal which starts from the apex of the fibro triangle and it ends at the adductor hiatus Which I shall show you just now. So for that let me retract the sartorius out of the way To show the continuation of the adductor canal. We can see this nerve which is continuing. We have Completely freed it from the adductor canal. Otherwise, it was deeply stuck inside This is the syphilis nerve and we can see the syphilis nerve is coming from the femoral nerve here So this is the longest cutaneous nerve. This is the anterior most structure in the adductor canal this passes through the adductor canal and Somewhere here it appears through the fascia of the adductor canal and it came to the median side of the knee and Here it runs in the complement with this vein here this is the Long syphilis vein and we can see here the syphilis nerve is running with the long syphilis vein and they run behind the medial side of the knee The next structure that we can see in the lower part of the adductor canal is This Artery here. This is the continuation of the femoral artery and just behind that we can see the continuation of the femoral vein and We can see multiple muscular branches and an upper part of the doctor canal. We can see this big nerve here. This is the Nerve to the Vastus medialis Now if I were to put my finger inside here where the femoral artery and the femoral veins are going and we can see that it Is disappearing and we cannot see it anymore Actually, it has disappeared into the adductor hiatus and it has entered into the Puppetial fossa. So therefore the adductor hiatus is the lower end of the doctor canal Which then leads into the Puppetial fossa. So that brings me to this concept of adductor hiatus If you take a look at this tendinous structure here where my instrument is tracing this one This is the adductor tendon. This is the hamstring component of the adductor magnets and just to bring you up to speed This muscle that we see here. This is the adductor magnets So this portion of the doctor Magnus is the hamstring component Which actually takes origin from the ischial tuberosity high up and the tendinous portion that's down vertically where my finger is tracing and we can see that it's a very stout Tendon here and the tendon then gets inserted onto the adductor tubercle exactly where my finger is located The adductor hiatus is therefore located between the adductor tendon and Adductor component of the hamstring muscle and that is exactly where the Femoral artery and the femoral vein is disappearing into the Puppetial fossa. So that is the next thing Which I want to draw your attention to. Thank you very much for watching Dr. Sanjo Sanyal signing out David over the camera person if you have any questions or comments Please put them in the comment section below. Have a nice day