Where Is Your Retinaculum?

A retinaculum is a band of thick deep fascia that holds the long tendons of your ankle (those that cross the ankle) in place.

Where are the retinaculum located?

The extensor retinaculum (dorsal carpal ligament; posterior annular ligament) is an anatomical term for the thickened part of the antebrachial fascia that holds the tendons of the extensor muscles in place. It is located on the back of the forearm, just proximal to the hand.

What is the purpose of a retinaculum?

A retinaculum (plural retinacula) is a band of thickened deep fascia around tendons that holds them in place. It is not part of any muscle. Its function is mostly to stabilize a tendon. The term retinaculum is New Latin, derived from the Latin verb retinere (to retain).