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. 2006 Dec;24(4):515-21.
doi: 10.1016/j.gaitpost.2005.12.002. Epub 2006 Jan 19.

A method for analyzing joint symmetry and normalcy, with an application to analyzing gait

Stephanie J Crenshaw  1 , James G Richards
Affiliations

A method for analyzing joint symmetry and normalcy, with an application to analyzing gait

Stephanie J Crenshaw et al. Gait Posture. 2006 Dec.

Abstract

A new method for analyzing symmetry and normalcy of gait patterns is explained. This method utilizes eigenvectors to compare waveforms. The right and left limbs of a single subject are compared to determine symmetry. To determine normalcy, a single limb from a subject is compared to a normative file created from the average of healthy control subjects. The analysis method provides four measures of symmetry and normalcy: trend phase, trend symmetry/normalcy, range amplitude ratio, and range offset. The trend symmetry/normalcy is a comparison of the shapes of the waveforms for each limb. The range amplitude ratio is a comparison of the range of motion of each limb. The range offset is a comparison of the range in which each limb operates. The exact methods and clinical applications are provided.

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