The popliteal fossa is very deep, how to return a responsibility?

summary

The popliteal fossa is a rhombic depression in the posterior region of the knee. In order to avoid this, female friends must take precautions. The outer and upper boundaries are biceps femoris, the inner and upper boundaries are semitendinosus and Semimembranous, and the lower, inner and outer boundaries are gastrocnemius medial and lateral head, respectively. The top of popliteal fossa (superficial) is the popliteal fascia, which is the continuation of the thigh fascia lata, and the downward movement is the leg deep fascia. Popliteal fascia is composed of longitudinal and transverse interwoven fibers, which are dense and tough. When suffering from popliteal cyst or popliteal aneurysm, the pain is obvious due to the limitation of popliteal fascia. From top to bottom, the popliteal fossa floor consists of the femoral popliteal surface, the posterior part of the knee joint capsule, the popliteal oblique ligament, the popliteal muscle and its fascia. So what's going on with the deep popliteal fossa? What about it? Let's take a look at it.

The popliteal fossa is very deep, how to return a responsibility?

First, it is located around the popliteal vessels, about 4-5. It contains the deep lymphatic vessels below the lower leg and the superficial lymphatic vessels in the posterior, lateral and lateral parts of the leg. The outflow lymphatic vessels were infused into the deep inguinal lymph nodes. There are important blood vessels and nerves in popliteal fossa, which are tibial nerve, popliteal vein and popliteal artery. There are also common peroneal nerve and deep popliteal lymph nodes around the blood vessels.

Second, the tibial nerve is located in the shallowest surface of the popliteal fossa, which is separated from the sciatic nerve in the upper corner of the popliteal fossa, and goes down along the midline of the popliteal fossa to the lower edge of the popliteal muscle, through the soleus tendon arch, and into the posterior region of the leg. In the popliteal fossa, the branches and joints extend to the adjacent muscles and knee joints. In addition, the medial sural cutaneous nerve, accompanied by saphenous vein descending to the back of the leg, joined the sural nerve. The common peroneal nerve is the other terminal branch of the sciatic nerve, which generally starts from the superior popliteal angle, runs outward and downward along the medial edge of the biceps femoris tendon, crosses the surface of the lateral head of the gastrocnemius muscle, goes below the fibular head and around the fibular neck, where it is divided into superficial peroneal nerve and deep peroneal nerve. The common peroneal nerve is close to the bone surface at the neck of fibula, and there is no muscular tissue covering the surface. Therefore, the common peroneal nerve is easy to be damaged when the fibular neck fracture or this part of trauma, causing paralysis of the anterior and lateral leg muscles, leading to foot ptosis. The common peroneal nerve sends out articular and cutaneous branches (communicating branch of peroneal nerve and lateral sural cutaneous nerve) in popliteal fossa.

Third, it is the continuation of the femoral artery, the deepest position, close to the popliteal surface of the femur and the posterior part of the knee joint capsule, so supracondylar fracture of the femur is easy to damage the popliteal artery. The popliteal artery is located in the medial side of the tibial nerve, in front of the nerve in the middle, and in the lateral side of the nerve in the lower part. There are five branches of popliteal artery in popliteal fossa: medial superior genicular artery, lateral superior genicular artery, middle genicular artery, medial inferior genicular artery and lateral inferior genicular artery, which supply the knee joint and participate in the composition of the arterial network of the knee joint. Other branches nourish the muscles of the knee. In the inferior corner of popliteal fossa, the popliteal artery is divided into two terminal branches: anterior tibial artery and posterior tibial artery.

matters needing attention

In the treatment of popliteal fossa, the tibial nerve and popliteal artery should be careful to avoid injury.