Crural interosseous nerve

The crural interosseous nerve arises distally from the muscular branches of the tibial nerve (specifically from a branch to the popliteus muscle). The crural interosseous nerve innervates the deep muscles of the posterior compartment of the leg.

In a cadaveric study, thecrural interosseous nervewas identified in 53.8% of the specimens dissected. The nerve has a mean diameter of 0.46 mm and a mean length of 20.9 mm. It was found to have vascular, muscular, and ligamentous branches. In 53.8% of cases, the IOCn reached the inferior tibiofibular joint, while in 46.2% of cases, it terminated in the interosseous membrane of the leg. Additionally, the nerve gave off multiple vascular branches to the fibular artery and, in rare instances, pierced the interosseous membrane to innervate muscles of the anterior compartment of the leg.[1]