retinaculum

A retinaculum (: retinacula) is a band of thickened deep fascia around tendons that holds them in place. It is not part of any muscle and primarily functions to stabilize tendons. The term retinaculum is Neo-Latin, derived from the Latin verb retinere (to retain). Specific retinacula include: In the wrist: Flexor retinaculum of the hand Extensor retinaculum of the hand In the ankle: Flexor retinaculum of foot Superior extensor retinaculum of foot Inferior extensor retinaculum of foot Superior fibular retinaculum Inferior fibular retinaculum In the knee: Lateral retinaculum Medial patellar retinaculum

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