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, 1 (1), 11-20

Discriminating Between Elderly and Young Using a Fractal Dimension Analysis of Centre of Pressure

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Discriminating Between Elderly and Young Using a Fractal Dimension Analysis of Centre of Pressure

Tim L A Doyle et al. Int J Med Sci.

Abstract

The aim of this project was to evaluate the use of a new analysis technique, fractal dimension analysis, for quantification of quiet stance centre of pressure (COP). By using a fractal dimension analysis of COP, it might be possible to gain more information about control during quiet stance than traditional analyses have previously allowed. The current project considered a group of young healthy participants and a group of elderly healthy participants to compare traditional measures of COP against a fractal dimension analysis of COP. Results indicated that both types of analyses are able to distinguish between eyes open and eyes closed in the elderly group. However, the fractal dimension analysis more accurately detected differences between the participant groups when standing with their eyes closed. Based on these results it is suggested that fractal dimension analysis is more informative about posture control than traditional measures. It is suggested that a fractal dimension type of analysis can be incorporated into clinical testing to identify patients with pathologies.

Conflict of interest statement

Conflict of interest: The authors have declared that no conflict of interest exists.

Figures

Figure 1
Figure 1
Representative data for illustrative purposes. Elderly participant data during eyes open condition. Original data in solid line, surrogate data represented by dashed line. For clarity only 30 seconds of the 2 minute data collection are presented.
Figure 2
Figure 2
Mean(SD) results of fractal dimension analysis of COP in A/P direction. ^ indicate a significant difference between young and elderly in the eyes closed condition; * indicate a significant difference between eyes open and eyes closed in the elderly only.
Figure 3
Figure 3
Mean(SD) results of fractal dimension analysis of COP in M/L direction. No significant differences were present.

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