J Middleton1, P Sinclair, R Patton. 1. Moorong Spinal Unit, Royal Rehabilitation Centre, Ryde, Sydney NSW 1680, Australia.
Abstract
OBJECTIVE: To evaluate the accuracy in determining centre of pressure when using a force platform for stabilometry research. DESIGN: Technical report. BACKGROUND: Previous studies have determined the accuracy of locating the centre of pressure by applying force through a single point. In human stabilometry research however, force is distributed across two feet and the centre of pressure located between the feet. METHODS: Forces were applied to a Kistler force platform using a force applied through a single point as well as when force was distributed between two metal blocks. RESULTS: Errors in calculating centre of pressure were substantially larger when force was applied through a single point than when the force was distributed between two blocks. CONCLUSIONS: Evaluating centre of pressure accuracy by applying force through a single point overestimates the errors inherent in human stabilometry research. RELEVANCE: Evaluating changes in the centre of pressure of human subjects standing on a force platform is a common tool for evaluating control mechanisms of balance. Accurate information regarding the centre of pressure is essential for the validity of this research.
OBJECTIVE: To evaluate the accuracy in determining centre of pressure when using a force platform for stabilometry research. DESIGN: Technical report. BACKGROUND: Previous studies have determined the accuracy of locating the centre of pressure by applying force through a single point. In human stabilometry research however, force is distributed across two feet and the centre of pressure located between the feet. METHODS: Forces were applied to a Kistler force platform using a force applied through a single point as well as when force was distributed between two metal blocks. RESULTS: Errors in calculating centre of pressure were substantially larger when force was applied through a single point than when the force was distributed between two blocks. CONCLUSIONS: Evaluating centre of pressure accuracy by applying force through a single point overestimates the errors inherent in human stabilometry research. RELEVANCE: Evaluating changes in the centre of pressure of human subjects standing on a force platform is a common tool for evaluating control mechanisms of balance. Accurate information regarding the centre of pressure is essential for the validity of this research.
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