The anterior crural septum divides the muscles in front of and lateral to the two bones into an anterior compartment, which contains four muscles including tibialis anterior, and a more laterally placed peroneal compartment, which contains two of the three peroneal muscles. ![]() These two septa are attached to the fibula here, and here. This is the posterior crural septum, lying just in front of the soleus muscle. To see them, we’ll remove the investing deep fascia down to here, exposing several muscles that we haven’t met yet. The other two septa have cumbersome names: they’re the anterior and the posterior crural intermuscular septa. At the ankle, the transverse septum is continuous with the flexor retinaculum. The transverse septum is thin up here, but toward the ankle it becomes thicker. Common Terms: This is most commonly referred to as compartment syndrome, with sub. To see the transverse septum better, we’ll remove the rest of soleus. Anatomical structures in the lower leg are often grouped into compartments. Three muscles that we haven’t seen yet lie between the transverse septum and the bones. It runs from here on the tibia, to here on the fibula. Dual (more common) or single incision (following slides). In front of soleus, this transverse intermuscular septum crosses the back of the leg. 4 compartments: anterior, lateral, superficial posterior, deep posterior. Here’s soleus, divided, here’s the investing deep fascia, divided at a lower level. We’ll remove gastrocnemius and soleus, down to here. Together with the interosseous membrane, they divide the muscles of the leg into four compartments, two on the front of the leg, and two on the back. Now we’ll look at the fibrous septa, the singular of which is septum. Distally the investing deep fascia is continuous with the superficial part of the flexor retinaculum, with the peroneal retinaculum, and with the two parts of the extensor retinaculum. The investing deep fascia wraps around the back of the calcaneal tendon, like a sling. Covering these tissues is a tough membrane called a fascia. The compartments are divided by septa formed from the fascia.The compartments usually have nerve and blood supplies separate from their neighbours. It’s attached to the fibula not directly, but indirectly by two fibrous septa here, and here, that we’ll see in a minute. Compartments are groupings of muscles, nerves, and blood vessels in your arms and legs. The fascial compartments of the leg are the four fascial compartments that separate and contain the muscles of the lower leg (from the knee to the ankle). The investing deep fascia is attached to the tibia here, and here. This outer layer is the investing deep fasica. Before we move on to see the muscles that produce inversion and eversion, we need to digress for two minutes, to look at the layer of deep fascia that surrounds all the muscles of the leg, and the three fibrous partitions, or septa that divide the leg muscles into somewhat distinct compartments.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |