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Document Title: Beynnon-AJSM-Mar99
Article Title: The effect of anterior cruciate ligament trauma and bracing on knee proprioception
Authors: Bruce D. Beynnon, Steven H. Ryder, Lars Konradsen, Robert J. Johnson, Kelly Johnson, Per Renstrom.
Publication: The American Journal of Sports Medicine; Baltimore; Mar/Apr 1999;
ISSN: 03635465
Date: March-April 1999.
Volume: 27
Issue: 2
Pages: 150-155
Key Words: Knee, neuromuscular, ACL, bracing, proprioception.
Beynnon et al. found that the wearing of a functional knee brace or neoprene sleeve brings a slight improvement in proprioception. (Proprioception was characterized by sensitivity of detection to having the knee moved passively.) They noted that loss of the ACL invariably raises the threshold to detection of passive motion, hence underscoring the importance of serviceable ACL tissue to optimal athletic performance.
ABSTRACT
We studied the effect that chronic anterior cruciate ligament disruption, functional bracing, and a neoprene sleeve have on knee proprioception by measuring the threshold to detection of passive knee motion in all three conditions. The threshold to detection of passive knee motion was worse in knees with chronic anterior cruciate ligament insufficiency when compared with uninjured knees. This difference was small, on average an additional 0.280 of flexion-extension rotation was required for the anterior cruciate ligament-deficient knee before the subject detected motion, and of questionable significance from a clinical and functional perspective. Wearing a functional brace or neoprene sleeve on the anterior cruciate ligament-deficient knee did not significantly change the threshold to detection of passive motion in comparison with the same knee without a brace, although improvements were observed. There was no relationship between the most common clinical means of characterizing altered biomechanics of the anterior cruciate ligament-deficient knee (that is, the magnitude of anterior-posterior knee laxity and the grade of pivot shift) and the threshold to detection of passive knee motion.
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