The fibular retinacula (also known as peroneal retinacula) are fibrous retaining bands that bind down the tendons of the fibularis longus and fibularis brevis muscles as they run across the side of the ankle.
The fibular retinacula (also known as peroneal retinacula) are fibrous attachments that hold the tendons of the fibularis longus and fibularis brevis muscles in place as they travel across the ankle's outer edge.