Abstract

TINOCO, Héctor A.  and  ARIAS-MORENO, Andrés J.. Kinematic analysis of a lower limb to determine the center of rotation of the knee at the sagittal plane. Ing. compet. [online]. 2014, vol.16, n.1, pp.195-205. ISSN 0123-3033.

A methodology is established in this research which permits to describe the movement of a lower limb using closed kinematic chains. This analysis is developed with the aim to determine the location of the center of rotation (CR) of the knee joint in the sagittal plane. Flexion-extension tests were carried out on one of the lower limbs of a healthy patient without pathological antecedents. When the patient does articular movement (flexion-extension), a video equipment and a software determine the position of four passive markers installed on the lower limb. The information obtained from the markers is applied to the proposed model which allows to locate the center of rotation of the knee joint. Hence it was concluded that the CR of the knee joint undergoes a relative movement with respect to the fixed point marked on the lower limb. The results prove that the knee joint established in the sagittal plane does not show the behavior of a complete joint (a joint with one degree of freedom) as it has been described in other studies

Keywords : center of rotation; flexion-extension; kinematic analysis; knee.

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