The superior extensor retinaculum: this is a strong, broad band of deep fascia which passes from the fibula to the tibia, proximal to the malleoli. ![]() Inferiorly, two band-like thickenings of the deep fascia form retinacula that bind the tendons of the anterior compartment muscles before and after they cross the ankle joint, preventing them from bowstringing anteriorly during dorsiflexion of the joint. The fascia is dense superiorly, providing part of the proximally attachment of the muscle immediately deep to it. ![]() On the anterolateral side of the leg, there is a deep fascia of the leg. This superficial fascia of the tibia has subcutaneous fat attached to its periosteum. Thus at the anterior part of the leg, there is only subcutaneous tissue of the tibia on the medial side. The deep fascia of the leg covers only muscles, being attached to the periosteum at all places where bone is subcutaneous. Transverse crural ligament, ligamentum transversum cruris On the plantar surface, the subcutaneous tissue is tough and fibrous than in other areas of the foot. The subcutaneous tissue lying deep to the dorsal skin is loose and prone to oedema. On the foot, there are superficial (subcutaneous) and deep fasciae. However, formation of pus (suppuration) from pus-forming (purulent) infections in the lateral compartment of the leg can ascend proximally into the popliteal fossa (a fat-filled diamond shaped space relatively confined posterior to the knee and is traversed by all neurovascular structures passing between the thigh and the leg).įascia and septa divide other soft and bony tissues of the leg into three fascial compartments, namely, anterior, lateral, and posterior compartments. Inflammations within such closed spaces or compartments spread chiefly in a distal direction. ![]() Like fasciae of most parts of the limbs, the fasciae of the leg and foot form closed spaces which end proximally and distally at the joints.
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