 This is the demonstration of the dorsal motherhood. The dorsal motherhood is covered by a facial called the dorsal facial and therefore it converts the dorsal motherhood into a compartment which is called the dorsal compartment. What are the structures of the dorsal compartment? Straight away we can see these big long tendons. This is the TBL's anterior tendon. This is the extrinsic helices longest tendon. These multiple tendons that we see here, these are the extrinsic digital tendons and further naturally we have the fibular hysteria. Once we reflect them, we see yet another set of tendons and muscle. We purposely did not cut these tendons because we wanted to retain the anatomical situation. Once we retract them, we notice one muscle here, which I have lifted up. This is the muscle which is unique to the dorsal compartment. This is the extrinsic helices braves. This extrinsic helices braves. And as we can see the tendon goes and it merges on the under surface of the extrinsic helices longest. So this is one muscle of the dorsal compartment. Arising in the same place as the extrinsic helices braves is this next muscle that we have picked up here. This muscle. This is the extrinsic digital braves. And we can see that extrinsic digital braves is also giving multiple tendons. We have retracted the extrinsic digital tendons to show you the smaller tendons of the extrinsic digital braves. And we can see that each tendon of the extrinsic digital braves is covered by a bravestendon which goes and attaches to the under surface. So this is the extrinsic digital braves which we have lifted up and these are the tendons. These are the muscles which are unique to the dorsal compartment. Now let's take a look at the neurovascular structures in the dorsal compartment. We can see this artery here. This is the continuation of the anterior tibial artery. The anterior tibial artery runs in the anterior compartment of the leg and then it goes under the extrinsic reticulum and after that it becomes an dorsal-espidious artery. The textbooks describe the dorsal-espidious artery as being lateral to the extrinsic halusus longus tendon but in this case we notice that the dorsal-espidious artery was medial to the extrinsic halusus longus tendon. The dorsal-espidious artery then runs on the dorsal mother foot. It gives branches, medial and lateral dorsal branches and it gives a big artery which goes like this that is known as the archivate artery. And this archivate artery is multiple dorsal metatarsal arteries and finally the dorsal-espidious terminates as the first dorsal metatarsal artery and a perforating artery which goes to the sole of the foot. So this is the dorsal-espidious. We can feel the pulsation of the dorsal-espidious just lateral to the extrinsic halusus longus tendon against the head of the talus or the navicular bone exactly where my thumb is located and that is used clinically to palpate the foot pulsation in cases of suspected peripheral vascular disease. The next structure that we can see in the foot extending from the anterior compartment is this nerve here. This is the continuation of the deep fibular nerve. After it is supplied the muscles of the anterior compartment the deep fibular nerve then continues under the extrinsic reticulum and it supplies the muscles of the dorsal compartment namely the extrinsic halusus brevis and the extrinsic digital brevis which I showed a little while earlier. And thereafter the deep fibular nerve terminates by piercing the skin and we can see the branch here and it supplies the skin of the first inter-digital cleft exactly where my instrument is tracing and this is the first dorsal-metatarsal cutaneous nerve. There is one important clinical correlation at this juncture. This deep fibular nerve can get entrapped under the extrinsic reticulum which as we can see is a very tough structure here and that condition especially occurs with skiers who wear tight boots and they tie the shoelace tightly across the dorsal of the foot in which case that compounds the compression of the deep fibular nerve and that is known as ski boots syndrome. Such patients will have weakness under the two dorsal compartment muscles and they will have loss of sensation or tingling periscesia and numbness in the first inter-metatarsal space. On the dorsal of the foot we can also see some superficial cutaneous structures notably this structure which I have lifted up here. This is the beginning of the formation of the long syphilis vein and we can trace the long syphilis vein approximately all the way up and this is the longest superficial cutaneous vein which goes all the way to the thigh. It starts by a union of all the dorsal venous network and it starts as the medial marginal vein and we can see that it continues the medial marginal vein and it runs in front of the medial malleolus and then it runs on the medial side of the leg and accompanying this long syphilis vein is this nerve here and we can see that nerve here and we can see a little bit of the fibers of the nerve here. This is the syphilis nerve which is the longest cutaneous branch of the femoral nerve and it's the only branch of the femoral nerve which goes outside the thigh and this accompanies the long syphilis vein. The long syphilis vein, this is a very useful site just above and anterior to the medial malleolus where we do vene section or vene puncture. This long syphilis vein can also be harvested for coronary artery bypass grafting in which case they can be an inadvertent injury of the branches of the syphilis nerve and the patient may have peristicia, numbness or tingling on the medial side of the leg and foot. So this is the cutaneous structure that we can see here on the dorsal of the foot extending onto the leg. Another important structure that we can see cutaneous structure is this one which we have retained here. This is the superficial fibular nerve. The superficial fibular nerve pierces the deep fascia where my instrument is located here. We have removed the deep fascia here. It supplied the muscles of the lateral compartment and after that in the lower one third of the leg it pierces the deep fascia and then it runs on the anterior lateral aspect of the lower one third of the leg as we can see here and it divides into multiple cutaneous branches. This nerve runs superficial to the extensor retiniculum and it supplies the skin of the entire dorsal of the foot except the first intermediate dorsal space which of course we have mentioned is supplied by the deep fibular nerve. Superficial fibular nerve in a thin person can be seen as small fibres standing up on the dorsal of the foot if the foot is stretched and the toes are extended. Patients who have repeated inversion injuries of the foot they get traction neuropathy of the superficial fibular nerve. So these are the structures that we can see of the dorsal of the foot extending from the leg or other way round. Thank you very much for watching. Dr. Sanjay Sanyal signing out. If you have any questions or comments please put them in the comment section below. Have a nice day.