Vector (butterfly) diagrams for 0steoarthritic gait: a preliminary report

Abstract

This paper describes briefly a simple three-dimensional vector diagram display combining all the force components of gait in one diagram. The locus of the centre of pressure of the feet on the ground is fully illustrated. This provides a useful reference for the consideration of the position of the centre of body mass over one foot or the other. In the case of some pathological gaits, the lateral displacement can be substantial. The traditional two-dimensional diagram fails to show some of these effects.