PMID: 9174452Apr 1, 1997Paper

Neural and muscular electric activity in the cat's knee. Changes when the anterior cruciate ligament is transected

Acta Orthopaedica Scandinavica
Enrique Gómez-BarrenaL Munuera

Abstract

We studied the response of the normal and unstable knee to passive motion and anterior tibial displacement in the cat. 6 cats were anesthetized and the deep level of anesthesia was controlled by electroencephalograms. We recorded electric activity in the articular nerves (posterior PAN and medial MAN) and periarticular muscles (quadriceps and hamstring), while performing passive flexion, extension, internal and external rotation. We then produced anterior displacement of the tibia at 30 degrees and 90 degrees of flexion, as in the Lachman and the anterior drawer maneuvers. The anterior cruciate ligament was surgically sectioned and the same series of passive displacements was performed. We observed statistically significant increased activity in the MAN, the PAN and the quadriceps muscle during knee flexion, in the MAN during extension, and in the PAN and hamstring during external rotation with the knee 90 degrees flexed. Anterior cruciate transection caused anterior displacement of the tibia during stress. This produced a significant increase in the MAN activity and a significant decrease in the hamstring electric activity at 30 degrees and 90 degrees of flexion, as in Lachman and anterior drawer maneuvers. We conclude that el...Continue Reading

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Citations

Sep 30, 2008·Archives of Orthopaedic and Trauma Surgery·Nuria BonsfillsEnrique Gomez-Barrena
Aug 23, 2008·European Journal of Applied Physiology·N BonsfillsA Núñez
Nov 23, 2006·Arthritis Research & Therapy·Jason J McDougall
Oct 23, 2001·The Journal of Orthopaedic and Sports Physical Therapy·G N WilliamsL Snyder-Mackler
Oct 23, 2001·The Journal of Orthopaedic and Sports Physical Therapy·T FridénR Zätterström
Jun 15, 1999·Acta Orthopaedica Scandinavica·E Gómez-BarrenaL Munuera
Oct 23, 2001·The Journal of Orthopaedic and Sports Physical Therapy·L A HiemstraP J Fowler
Dec 4, 2009·Seminars in Arthritis and Rheumatism·David Andrew Rice, Peter John McNair
Dec 26, 2006·Veterinary Surgery : VS·Hilde de RoosterHenri van Bree
Oct 6, 1998·The Journal of Bone and Joint Surgery. American Volume·T Hogervorst, R A Brand

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