PROBLEM TO BE SOLVED: To clarify a difference in distribution between a healthy person and a patient in a frequency analysis of centroid oscillation.SOLUTION: A centroid oscillation analyzer comprises: a force plate； centroid coordinate acquisition means that uses load data detected by the force plate to acquire time-series data about a centroid coordinate on an XY plane； power spectrum calculation means that calculates a power spectrum about the acquired centroid coordinate； and frequency analysis means that performs a frequency analysis from a relationship between the calculated power spectrum and frequency. The frequency analysis means uses a value (x-A)/SD, which is obtained by normalizing a power spectrum x in centroid oscillation of a subject through the use of an average A of the power spectrum in the centroid oscillation of a healthy person and a standard deviation SD of the power spectrum in the centroid oscillation of the healthy person, as an index value, with respect to each frequency.SELECTED DRAWING: Figure 1
