Quantitative assessment of gait parameters in horses: Useful for aiding clinical decision making?
Authors: T. Pfau, A. Fiske‐Jackson, M. Rhodin
Journal: Equine Veterinary Education
Summary
# Gait Analysis for Lameness: Moving Quantitative Assessment into Practice Quantitative gait analysis using inertial motion sensors has transitioned from research laboratories into clinical settings, offering objective measurement of the head nods and pelvic hikes that characterise lameness in horses. Pfau, Fiske-Jackson and Rhodin reviewed current evidence on how these kinematic parameters correlate with underlying mechanical changes, examining validation studies that demonstrate sensor accuracy and precision between 3–7 mm—a threshold below the detection capability of visual assessment alone. The authors synthesised findings from studies incorporating inertial sensors during lungeing, flexion tests and diagnostic analgesia, noting that whilst lungeing itself induces asymmetrical movement patterns in sound horses, consistent baseline values are emerging for interpreting changes following diagnostic procedures. Current sensor systems effectively quantify the major mechanical adaptations in both forelimb and hindlimb lameness, though they do not capture all gait deviations clinicians observe. For practitioners considering this technology, rigorous understanding of the parameters being measured and awareness of the sensors' inherent limitations are essential to avoid misinterpreting data and making sound clinical decisions.
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Practical Takeaways
- •Inertial sensors can objectify lameness assessment by measuring head nod and hip hike with greater precision than visual evaluation, supporting more consistent clinical decisions
- •Lungeing and flexion tests produce predictable gait changes; understand these adaptations to avoid misinterpreting sensor data as pathological movement
- •Sensor accuracy of 3-7 mm is clinically meaningful and below human visual detection limits, making these tools valuable for tracking subtle changes and validating your clinical impression
Key Findings
- •Head nod and hip hike are reliable mechanical indicators of lameness that can be quantified with inertial sensors with 3-7 mm accuracy, below the visual detection threshold
- •Inertial sensor systems demonstrate accuracy, precision and repeatability suitable for clinical decision-making in lameness evaluation
- •Lungeing introduces kinematic adaptations causing head and pelvic movement asymmetry even in sound horses, affecting interpretation
- •Current inertial sensor technology characterizes major mechanical changes in fore- and hindlimb lameness but does not capture all gait adaptations