Is a single force plate adequate for stabilographic analysis in horses?

Summary

# Editorial Summary Clayton and Nauwelaerts investigated a practical limitation in equine posturography: since standard force plates cannot accommodate all four limbs simultaneously, they examined whether measuring centre of pressure (COP) movement from either the forelimbs or hindlimbs alone could yield representative stabilographic data for assessing postural balance. Using a single force plate to record weight distribution and postural sway in standing horses, the researchers compared stabilographic variables (including velocity and displacement of the COP) between measurements taken from the front and hind quarters, evaluating their consistency and clinical utility. The findings revealed meaningful differences in COP variables between forelimb and hindlimb measurements, with each providing distinct information about postural stability rather than being interchangeable. For practitioners using force plate analysis in lameness investigation or rehabilitation monitoring, this work underscores the importance of standardising which limb pair is assessed during testing and recognising that forelimb and hindlimb data reflect different biomechanical contributions to overall balance—a distinction that affects interpretation of subtle postural changes and longitudinal comparisons in individual horses.

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Key Findings

• •Single force plate data from forelimbs or hindlimbs can provide representative stabilographic variables for centre of pressure analysis
• •Force plate size limitations necessitate assessment of whether partial limb data is adequate for postural balance quantification in horses

Conditions Studied