Final answer:
Perform the Varus Stress Test to assess the integrity of the calcaneofibular ligament, where a varus force is applied to the calcaneus with the foot in plantar flexion.
Step-by-step explanation:
To test the calcaneofibular ligament for potential injury, you would perform the Varus Stress Test. This test applies an inversion force to the ankle, which, if there is ligamentous damage, will produce pain or excessive movement in the ankle joint. Specifically, the calcaneofibular ligament is assessed by stabilizing the lower leg while the foot is held in approximately 20 degrees of plantar flexion. Then, a varus (inversion) force is applied to the calcaneus to test the integrity of the ligament.