Evaluation of Ankle Joint Proprioception Following Injection of the Anterior Talofibular Ligament

The purpose of this investigation was to measure ankle joint proprioception preceding and following injection of Xylocaine into the anterior talofibular ligament (ATFL). Previous investigators have indicated that the typical inversion ankle sprain causes decreased afferent input from the joint which results in a proprioceptive deficit at the ankle. It was hypothesized that anesthesia of the ATFL would simulate this proprioceptive deficit. Fourteen individuals were blindfolded and subjected to pre-test proprioceptive measurements on a multiaxial balance evaluator. Xylocaine was introduced into the ATFL and post-test measurements were taken. A significant increase in average time in balance was found following anesthesia of the ATFL. The unexpected results may indicate that multiple trials caused a learning effect. This supports the contention of other investigators that proprioceptive deficits can be improved with training. It is concluded that proprioceptive training should be included in the overall rehabilitation program following ankle sprains. J Orthop Sports Phys Ther 1986;8(2):70-76.