The original descriptions of the CGM referred to it as “a data collection and reduction technique” (Davis, 1981 and an "an algorithm for computing lower extremity joint motion" (Kadaba, 1990). There is a strong argument that, as originally described, the CGM, is not actually a biomechanical model. This page thus aims to describe the concepts in a manner which is consistent with both the original description and a contemporary understanding of biomechanical modelling.
The mode is best described in four stages:
- Overview of the basic kinematic chain of segments.
- Definition of the segments in terms of the underlying anatomy.
- Description of placement of markers consistent with the anatomical segment definitions.
- Description of model outputs.
- Variants. .