the muscle's attachments to the head and body of the fibula, there is a gap through which the common fibular nerve passes to the front of the leg.

The muscle ends in a long tendon, which runs behind the lateral malleolus of the ankle in a groove that it shares with the tendon of the fibularis brevis; the groove is converted into a canal by the superior fibular retinaculum, and the tendons in it are contained