Crural Fascia

Fig. 14.10a-d. Anatomy of the peroneal nerve, a Schematic drawing of a lateral view of the knee illustrates the course of the common peroneal nerve (curved arrows) which branches from the sciatic nerve (black arrow) at the apex of the popliteal fossa and descends posterior to the biceps femoris muscle (Bf) and tendon (asterisk) to turn anteriorly around the fibular head. The nerve then continues down between the lateral side of the neck of the fibula and the peroneus longus muscle (PI). Here the peroneal nerve divides into its two terminal branches, the superficial peroneal nerve (white arrowhead) and the deep peroneal nerve (white arrow), md sends a recurrent articular branch (open arrowhead).b-d Transverse Tl-weighted MR images obtained at the levels indicated in a (horizontal bars) reveal the normal position of the common peroneal nerve (curved arrow) relative to the biceps tendon, the crural fascia (open arrowhead) fibular head (FH). Note the relationships of the main trunk and the superficial (white arrowhead) and deep (white arrow) peroneal nerves with the fibular and neck (FN). Black arrow, tibial nerve... 

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