Measurement of the screw-home motion of the knee is sensitive to errors in axis alignment.

@article{Piazza2000MeasurementOT,
  title={Measurement of the screw-home motion of the knee is sensitive to errors in axis alignment.},
  author={Stephen J. Piazza and Peter Re Cavanagh},
  journal={Journal of biomechanics},
  year={2000},
  volume={33 8},
  pages={1029-34}
}
Measurements of joint angles during motion analysis are subject to error caused by kinematic crosstalk, that is, one joint rotation (e. g., flexion) being interpreted as another (e.g., abduction). Kinematic crosstalk results from the chosen joint coordinate system being misaligned with the axes about which rotations are assumed to occur. The aim of this paper is to demonstrate that measurement of the so-called "screw-home" motion of the human knee, in which axial rotation and extension are… CONTINUE READING