ISOMETRY OF THE POSTERIOR CRUCIATE LIGAMENT - EFFECTS OF FUNCTIONAL LOAD AND MUSCLE FORCE APPLICATION

Citation
Gj. Oritz et al., ISOMETRY OF THE POSTERIOR CRUCIATE LIGAMENT - EFFECTS OF FUNCTIONAL LOAD AND MUSCLE FORCE APPLICATION, American journal of sports medicine, 26(5), 1998, pp. 663-668
Citations number
33
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Sport Sciences
ISSN journal
0363-5465
Volume
26
Issue
5
Year of publication
1998
Pages
663 - 668
Database
ISI
SICI code
0363-5465(1998)26:5<663:IOTPCL>2.0.ZU;2-W
Abstract
The effects of functional load and muscle force application on isometr y of the posterior cruciate ligament were determined. Eight fresh-froz en cadaver knees were mounted in a custom-designed rig. A full range o f motion and muscle forces were applied through the quadriceps, hamstr ing, and gastrocnemius tendons during a simulated static squat maneuve r. The low-load isometric posterior cruciate ligament point was locate d 5.63 mm proximal and 0.18 mm anterior to the anatomic center of the posterior cruciate ligament origin on the femur. The high-load state, with no gastrocnemius and hamstring muscle forces applied, shifted the isometric point 6.32 mm proximal and 6.72 mm anterior (P < 0.05). Loa ding the hamstring and gastrocnemius muscles also shifted the isometri c point (P < 0.05). This study indicated that the most isometric regio n of the posterior cruciate ligament femoral attachment changed signif icantly when functional loads and muscle forces were applied to the kn ee. This finding may have implications for both surgical reconstructio n and rehabilitation of the posterior cruciate ligament-injured knee.