Fascial compartments of leg

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Cross-section through middle of leg. (Anterior compartment at upper left; lateral at center left; deep posterior at center; superficial posterior at bottom right.

On the human body, the limbs can be divided into segments, such as the arm and the forearm of the upper limb, and the thigh and the leg of the lower limb. If these segments are cut transversely, it is apparent that they are divided into multiple sections. These are called fascial compartments, and are formed by tough connective tissue septa. These compartments usually have a separate nerve and blood supply to their neighbours. The muscles in each compartment will often all be supplied by the same nerve.

The (lower) leg is divided into three compartments by the interosseous membrane of the leg):

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