Analyze Diet
Equine veterinary journal. Supplement2011; (38); 417-424; doi: 10.1111/j.2042-3306.2010.00200.x

Inertial sensors for assessment of back movement in horses during locomotion over ground.

Abstract: Assessing back movement is an important part of clinical examination in the horse and objective assessment tools allow for evaluating success of treatment. Objective: Accuracy and consistency of inertial sensor measurements for quantification of back movement and movement symmetry during over ground locomotion were assessed; sensor measurements were compared to optical motion capture (mocap) and consistency of measurements focusing on movement symmetry was measured. Methods: Six nonlame horses were trotted in hand with synchronised mocap and inertial sensor data collection (landmarks: T6, T10, T13, L1 and S3). Inertial sensor data were processed using published methods and symmetry of dorsoventral displacement was assessed based on energy ratio, a Fourier based symmetry measure. Limits of agreement were calculated and visualised to compare mocap and sensor data. Consistency of sensor measurements was assessed using Pearson correlation coefficients and linear regression to investigate the effect of speed on movement symmetry. Results: Dorsoventral and mediolateral sensor displacement was observed to lie within ± 4-5 mm (± 2 s.d., 9-28% of movement amplitude) and energy ratio to lie within ± 0.03 of mocap data. High levels of correlation were found between strides and trials (0.86-1.0) for each horse and each sensor and variability of symmetry was lowest for T13 followed by T10, T6, L1 and S3 with no significant effect of speed at T6, T10 and T13. Conclusions: Inertial sensor displacement and symmetry data showed acceptable accuracy and good levels of consistency for back movement. The small mediolateral movement amplitude means that changes of <25% in mediolateral amplitude (also unlikely to be detected by visual assessment) may go undetected. New sensor generations with improved sensor sensitivity and ease of use of equipment indicate good potential for use in a field situation.
Publication Date: 2011-05-27 PubMed ID: 21059039DOI: 10.1111/j.2042-3306.2010.00200.xGoogle Scholar: Lookup
The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

The research article involves an examination of using inertial sensors for evaluating back movement in horses during ground locomotion. Its aim is to assess the accuracy and consistency of the measurements these sensors produce and to compare the results with data from optical motion capture.

Objectives and Methodology

  • The study had two primary objectives. The first was to assess the accuracy and consistency of measurements obtained by inertial sensors for evaluating back movement in horses. The second was a comparison of these sensor readings against measurements collected through optical motion capture.
  • For achieving these objectives, six non-lame horses were made to trot while their movements were recorded through both inertial sensors and optical motion capture.
  • These recordings were made at five different points on the horses’ back: T6, T10, T13, L1, and S3. The inertial sensor data, thus obtained, was processed using previously published methods.
  • The researchers also examined the symmetry of dorsoventral displacement based on an energy ratio, a measure of symmetry derived from Fourier methods.
  • Furthermore, to compare the mocap data and that of the sensor, limits of agreement were calculated and visualised.
  • Finally, the consistency of the sensor measurements was assessed through Pearson correlation coefficients and linear regression to investigate any effects of speed on movement symmetry.

Results

  • The study found that dorsoventral and mediolateral sensor displacement was within ± 4-5mm (±2 standard deviations, 9-28% of movement amplitude) and energy ratio was within ±0.03 of the mocap data. These results indicate that the measurements obtained from the inertial sensors fell within acceptable accuracy ranges, and they showed good levels of consistency for back movement assessment.
  • The strains and trials showed high levels of correlation (0.86-1.0) for each horse and each sensor. Variability of symmetry was lowest for T13, followed by T10, T6, L1, and S3.
  • The data also showed no significant impact of speed on movement symmetry at the T6, T10, and T13 points.

Conclusion

  • The study concluded that the measurements of back movement obtained from inertial sensors in the horses had acceptable accuracy and showed good consistency.
  • However, due to the small mediolateral movement amplitude, changes of <25% in mediolateral amplitude, which are unlikely to be detected by visual assessment, might not be recognized.
  • The research suggests that newer sensor generations with improved sensitivity and robustness promise good potential for practical use in field situations.

Cite This Article

APA
Warner SM, Koch TO, Pfau T. (2011). Inertial sensors for assessment of back movement in horses during locomotion over ground. Equine Vet J Suppl(38), 417-424. https://doi.org/10.1111/j.2042-3306.2010.00200.x

Publication

NlmUniqueID: 9614088
Country: United States
Language: English
Issue: 38
Pages: 417-424

Researcher Affiliations

Warner, S M
  • Department of Veterinary Clinical Sciences, The Royal Veterinary College, University of London, UK.
Koch, T O
    Pfau, T

      MeSH Terms

      • Animals
      • Back / physiology
      • Biomechanical Phenomena / physiology
      • Horses / physiology
      • Locomotion / physiology
      • Signal Processing, Computer-Assisted

      Citations

      This article has been cited 35 times.