 It is continuous with the palmar carpal ligament, which is located on the anterior side of the forearm.It is a strong, fibrous band, extending obliquely downward and medialward across the back of the wrist, and consisting of part of the deep fascia of the back of the forearm, strengthened by the addition of some transverse fibers.The extensor retinaculum is attached laterally to the lateral margin of the radius.