Transverse intermuscular septum of leg
Septum intermusculare transversum cruris
- Synonym: Transverse crural intermusclar septum
Definition
The transverse intermuscular septum of the leg (transverse crural septum; deep transverse fascia) separates the superficial posterior compartment from the deep posterior compartment of the leg. This septum is a fibrous sheet that extends transversely across the leg, attaching medially to the tibia and laterally to the fibula and that it is closely associated with the posterior tibial artery and tibial nerve.
Above, where it covers the popliteus, the transverse intermuscular septum of the leg is thick and dense, and receives an expansion from the tendon of the semimembranosus. It is thinner in the middle of the leg; but below, where it covers the tendons passing behind the malleoli, it is thickened and continuous with the laciniate ligament.
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