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Superior Extensor Retinaculum

Medically reviewed by: Stephanie Curreli, MD, PhD
Last Updated: Jun 19, 2015

The superior extensor retinaculum is a sheet of connective tissue that crosses over the front of the shin above the ankle, attached to both the tibia and fibula. The tissue formations in various regions of the ankle are thickened to form such retinacula in sheaths to hold tendons down as they are crossing the front of the ankle.