Comparison of microgyro-based measurements of equine metatarsal/metacarpal bone to a high speed video locomotion analysis system during treadmill locomotion.

The research article focuses on a comparison between an inertial motion system (IMS) and an optical based locomotion analysis system in measuring limb movements of horses. Results show the IMS potentially providing a more quantifiable measure of range of motion and phase shift in the movement of equine distal limbs.

Objective of the Study

• The study aimed to evaluate and compare the effectiveness of an Inertial motion system (IMS) and an optical based locomotion analysis system in measuring sagittal segment angles (movements in forward and backward direction) of equine’s metacarpal/metatarsal bones during walk and trot.

Methodology of the Study

• Two horses were selected for this study and were subjected to 20 trials each.
• The metacarpal/metatarsal bones of these horses were fitted with markers of the optical system and an IMS.

Findings of the Study

• The Inertial Motion System (IMS) measured a higher range of motion (ROM) than the optical system. The bias of measurements was 1.6° with a precision at 1.96 standard deviation at 1.9°. This indicates that the IMS was more likely to register a larger degree of movement as compared to the optical system.
• The same data was used to calculate the phase shift, which is the difference in timing of peak limb displacement between left and right limbs within a stride. The results displayed almost no bias and the precision was stated to be 0.025%, suggesting hardly any discrepancy or error in measurements.

Conclusion of the Study

• The research proved the potential of the IMS for quantifying range of motion and phase shifts of equine distal limb movements. This could provide valuable insights for evaluating and improving locomotion in horses, further leading to better performance and less injury.