Descends on the anterior surface of the interosseous membrane, accompanied by the deep peroneal nerve.ġ6 In the upper part of its course: Lies deep to the muscles ![]() Arises at the level of the lower border of the popliteus muscle Passes forward into the anterior compartment of the leg through an opening in the upper part of the interosseous membrane. Smaller of the terminal branches of the popliteal artery. Insertion: Medial cuneiform and base of first metatarsal bone Muscles Origin: Anterior surface of shaft of fibula Insertion: Base of fifth metatarsal bone Origin:Anterior surface of shaft of fibula Insertion: Base of distal phalanx of great toe Origin: Anterior surface of shaft of fibula Insertion: Extensor expansion of lateral four toes Tibialis anterior plays an important role in holding up the medial longitudinal arch in the foot Supplied by deep peroneal nerveġ4 Origin: Lateral surface of shaft of tibia and interosseous membrane These muscles are the primary toe extensors and dorsiflexors. Muscles: Tibialis anterior Extensor digitorum longus Peroneus tertius Extensor hallucis longus Blood supply: Anterior tibial artery Nerve supply: Deep peroneal nerve A small amount of lymph from the upper lateral part of the front of the leg may pass via vessels that accompany the small saphenous vein and drain into the popliteal nodes Numerous small veins curve around the medial aspect of the leg and ultimately drain into the great saphenous vein The lymphatics follow the great saphenous vein, to end in the vertical group of superficial inguinal lymph nodes. Lateral cutaneous nerve of the calf, a branch of the common peroneal nerve Lower part of the anterolateral surface: Superficial peroneal nerve, a branch of the common peroneal nerve Anteromedial surface of the leg: Saphenous nerve, a branch of the femoral nerve The various leg muscles act on multiple joints and produce the following movements: Ankle: Dorsiflexion and Plantar flexion Intertarsal joints: Inversion and Eversion of the foot Toes: Flexion and Extensionĩ Anterior & Lateral Compartments of the Legġ0 Cutaneous Nerves Upper part of the lateral surface: The tendons each possess a synovial sheath, which is continuous above with the common sheath. It binds the tendons of the peroneus longus and brevis Inferior Peroneal Retinaculum Binds the tendons of the peroneus longus and brevis muscles to the lateral side of the calcaneum. The tendons lie in compartments, each of which is lined by a synovial sheath.Ĭonnects the lateral malleolus to the lateral surface of the calcaneum. Binds the tendons of the deep muscles of the back of the leg to the back of the medial malleolus as they pass forward to enter the sole. Fibrous bands separate the tendons into compartments, each of which is lined by a synovial sheath.ĥ Flexor Retinaculum Extends from the medial malleolus downward and backward to be attached to the medial surface of the calcaneum. Superior Extensor Retinaculum Attached to the distal ends of the anterior borders of the fibula and tibia Inferior Extensor Retinaculum Y-shaped band located in front of the ankle joint. It is distinguished from pharmacokinetic compartment, which is a defined volume of body fluids.3 Deep Fasia of the Leg Continuous above with the deep fascia of the thigh (fascia lata) Below the tibial condyles, attached to the periosteum on the anterior and medial borders of the tibia Two intermuscular septae pass from its deep aspect to be attached to the fibula Together with the interosseous membrane, the septae divide the leg into anterior, lateral, posterior compartments Distally, the fascia thickens and forms the flexor, extensor, and fibular retinaculaeĤ Retinacula Around the ankle, the deep fascia thickens to form retinacula that keep the long tendons around the ankle joint in position and act as pulleys. Sometimes the segment is also covered by bone profoundly (as e.g. The muscles in each compartment will often all be supplied by the same nerve. ![]() ![]() These compartments usually have a nerve and blood supply separate from their neighbours. These are called fascial compartments, and are formed by tough connective tissue septa. If these segments are cut transversely, it is apparent that they are divided into multiple sections. ![]() Likewise, the lower limbs can be divided into two segments – the leg and the thigh – and these contain the fascial compartments of the leg and the fascial compartments of the thigh. In the human body, the limbs can each be divided into two segments – the upper limb can be divided into the arm and the forearm and the sectional compartments of both of these – the fascial compartments of the arm and the fascial compartments of the forearm contain an anterior and a posterior compartment. A fascial compartment is a section within the body that contains muscles and nerves and is surrounded by deep fascia.
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