The Silverskiloid test checks for
The Silfverskiold Test is helpful for assessing equinus. Equinus is a condition in which the amount of available dorsiflexion in the ankle joint is limited at <10 degrees of dorsiflexion. The test is performed by first, manipulating the subtalar joint into neutral position, and then evaluating the amount of passive dorsiflexion available to the patient with the knee fully extended (fig 1), and then again with the knee flexed 30 degrees (fig 2). If passive dorsiflexion is limited with the knee extended, and then corrected with the knee flexed, then the test is indicative of isolated gastrocnemius equinus. Conversely, if passive dorsiflexion is limited with both the knee extended and flexed, the test is indicative gastroc-soleal equinus (both the gastrocnemius and soleus).
Easley, E. Mark, and W. Sam Wiesel. Operative Techniques in Foot and Ankle Surgery. Lippincott, Williams & Wilkins., 2011.