Accurate marker placement is therefore paramount. Therefore, the lengths and orientations of the modeled segments are directly dependent on the marker positions. For example, Plug-in Gait directly calculates the kinematic model's joint centers from the measured XYZ marker positions on a frame-by-frame basis. It is assumed that you are familiar with Plug-in Gait, including the way the model works, where the markers are placed, and what the subject parameters mean. When you have run the relevant pipeline operations on your trials, you can produce gait analysis reports that conform to established clinical practices and import the resulting kinematic model of your subject (patient) into another software application, such as Vicon Polygon, for gait analysis. Plug-in Gait enables you to examine full, upper, or lower body joint kinematics and kinetics of patients. Vicon Nexus includes the required pre-defined Plug-in Gait marker set and pipelines to enable you to produce outputs of the joint kinematics and kinetics for gait analysis patients. It is based on the Newington-Helen Hayes gait model and has been validated through its frequent citation in peer-reviewed publications (see Plug-in Gait references). The Plug-in Gait model is Vicon's implementation of the Conventional Gait Model, which provides widely used and reliable full body kinematic and kinetic modeling, without the need for any customizations.
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