A Positive Quadriceps Active Test, without the Quadriceps Being Active. (28th December 2019)

• Record Type: Journal Article
• Authors: Kieser, D. C.; Savage, E.; Sharplin, P.
• Other Names: Nyland John Academic Editor.
• Is Part Of: Case reports in orthopedics. Volume 2019(2019)
• Publication Date: 2019-12-28
• Subjects: Orthopedics -- Periodicals; Orthopedics; Orthopedics; Periodicals; Electronic journals; Periodicals; 616.7
• DOI: 10.1155/2019/6135632
• Languages: English
• ISSNs: 2090-6749

Abstract

Abstract : Case . A 55-year-old male with a chronic isolated grade 3 PCL injury who demonstrates a positive quadriceps active test without activating his quadriceps musculature. Conclusion . Gravity and hamstring contraction posteriorly translate the tibia into a subluxed position. Subsequent gastrocnemius contraction with the knee flexed causes an anterior tibial translation by virtue of the mass enlargement of the gastrocnemius muscular bulk, the string of a bow effect, and the anterior origin of the gastrocnemius in relation to the posterior border of the subluxed tibia aided by the normal posterior tibial slope.