An injury to the tibiofibular ligament when the joint is carried through a range of motion greater than normal, but without dislocation or fracture. "High ankle sprain"
Symptoms:
Pain in the lower leg/upper ankle
Swelling in the ankle
Point tender on the tibiofibular ligament
Loss of ROM in the ankle
Causes:
Excessive rotation of the ankle (adduction or abduction of the foot)
Extremes of dorsiflexion
Combinations of dorsiflexion with adduction or abduction