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Sensors (Basel, Switzerland)2025; 25(4); 1095; doi: 10.3390/s25041095

Discrimination of the Lame Limb in Horses Using a Machine Learning Method (Support Vector Machine) Based on Asymmetry Indices Measured by the EQUISYM System.

Abstract: Lameness detection in horses is a critical challenge in equine veterinary practice, particularly when symptoms are mild. This study aimed to develop a predictive system using a support vector machine (SVM) to identify the affected limb in horses trotting in a straight line. The system analyzed data from inertial measurement units (IMUs) placed on the horse's head, withers, and pelvis, using variables such as vertical displacement and retraction angles. A total of 287 horses were included, with 256 showing single-limb lameness and 31 classified as sound. The model achieved an overall accuracy of 86%, with the highest success rates in identifying right and left forelimb lameness. However, there were challenges in identifying sound horses, with a 54.8% accuracy rate, and misclassification between forelimb and hindlimb lameness occurred in some cases. The study highlighted the importance of specific variables, such as vertical head and withers displacement, for accurate classification. Future research should focus on refining the model, exploring deep learning methods, and reducing the number of sensors required, with the goal of integrating these systems into equestrian equipment for early detection of locomotor issues.
Publication Date: 2025-02-12 PubMed ID: 40006323PubMed Central: PMC11858852DOI: 10.3390/s25041095Google Scholar: Lookup
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  • 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 study presents a machine learning technique (Support Vector Machine) aimed at distinguishing the lame limb in horses by analyzing asymmetry indices obtained from an EQUISYM system.

Introduction

In the field of equine veterinary practice, detecting lameness in horses can pose a significant challenge, especially when the symptoms are slight or mild. Understanding which limb is affected is crucial for diagnosis and treatment. This research endeavored to devise a predictive model utilizing an SVM (Support Vector Machine) to accurately pinpoint the injured limb in trotting horses.

Methodology

  • The researchers used data from IMUs (Inertial Measurement Units) that were strategically placed on the horse’s head, withers, and pelvis.
  • The SVM processed several variables, including vertical displacement and retraction angles.
  • A set of 287 horses were involved in this study, 256 of them were exhibiting single-limb lameness, and the remaining 31 were categorized as sound or healthy.

Results and Discussion

  • The developed machine learning model showed an overall accuracy of 86% in identifying the lame limb. It was particularly successful in detecting lameness in the right and left forelimbs.
  • However, the model had limitations in accurately identifying sound or healthy horses; it had an accuracy rate of only 54.8% in this aspect.
  • In addition, some cases of misclassification between forelimb and hindlimb lameness were reported.
  • The research underscored the importance of certain variables, such as vertical displacement of the head and withers, in ensuring precise classification of the lame limb.

Conclusion and Future Directions

  • The study proved to be a promising step forward in developing effective systems for detecting lameness in horses.
  • Suggestions for future research include refining the SVM model, exploring the use of deep learning techniques, and lessening the number of sensors needed for monitoring.
  • The end goal is to be able to incorporate these systems into equestrian equipment to promptly detect locomotor issues and save horses from unnecessary suffering.

Cite This Article

APA
Poizat E, Gérard M, Macaire C, De Azevedo E, Denoix JM, Coudry V, Jacquet S, Bertoni L, Tallaj A, Audigié F, Hatrisse C, Hébert C, Martin P, Marin F, Hanne-Poujade S, Chateau H. (2025). Discrimination of the Lame Limb in Horses Using a Machine Learning Method (Support Vector Machine) Based on Asymmetry Indices Measured by the EQUISYM System. Sensors (Basel), 25(4), 1095. https://doi.org/10.3390/s25041095

Publication

ISSN: 1424-8220
NlmUniqueID: 101204366
Country: Switzerland
Language: English
Volume: 25
Issue: 4
PII: 1095

Researcher Affiliations

Poizat, Emma
  • Centre d'Imagerie et de Recherche sur les Affections Locomotrices Equines (CIRALE), Ecole Nationale vétérinaire d'Alfort, 94700 Maisons-Alfort, France.
Gérard, Mahaut
  • Centre d'Imagerie et de Recherche sur les Affections Locomotrices Equines (CIRALE), Ecole Nationale vétérinaire d'Alfort, 94700 Maisons-Alfort, France.
  • LIM France, Labcom LIM-EnvA, 24300 Nontron, France.
Macaire, Claire
  • Centre d'Imagerie et de Recherche sur les Affections Locomotrices Equines (CIRALE), Ecole Nationale vétérinaire d'Alfort, 94700 Maisons-Alfort, France.
  • LIM France, Labcom LIM-EnvA, 24300 Nontron, France.
  • Laboratoire de BioMécanique et BioIngénierie (UMR CNRS 7338), Centre of Excellence for Human and Animal Movement Biomechanics (CoEMoB), Université de Technologie de Compiègne (UTC), Alliance Sorbonne Université, 60200 Compiègne, France.
De Azevedo, Emeline
  • Centre d'Imagerie et de Recherche sur les Affections Locomotrices Equines (CIRALE), Ecole Nationale vétérinaire d'Alfort, 94700 Maisons-Alfort, France.
Denoix, Jean-Marie
  • Centre d'Imagerie et de Recherche sur les Affections Locomotrices Equines (CIRALE), Ecole Nationale vétérinaire d'Alfort, 94700 Maisons-Alfort, France.
Coudry, Virginie
  • Centre d'Imagerie et de Recherche sur les Affections Locomotrices Equines (CIRALE), Ecole Nationale vétérinaire d'Alfort, 94700 Maisons-Alfort, France.
Jacquet, Sandrine
  • Centre d'Imagerie et de Recherche sur les Affections Locomotrices Equines (CIRALE), Ecole Nationale vétérinaire d'Alfort, 94700 Maisons-Alfort, France.
Bertoni, Lélia
  • Centre d'Imagerie et de Recherche sur les Affections Locomotrices Equines (CIRALE), Ecole Nationale vétérinaire d'Alfort, 94700 Maisons-Alfort, France.
Tallaj, Amélie
  • Centre d'Imagerie et de Recherche sur les Affections Locomotrices Equines (CIRALE), Ecole Nationale vétérinaire d'Alfort, 94700 Maisons-Alfort, France.
Audigié, Fabrice
  • Centre d'Imagerie et de Recherche sur les Affections Locomotrices Equines (CIRALE), Ecole Nationale vétérinaire d'Alfort, 94700 Maisons-Alfort, France.
Hatrisse, Chloé
  • Centre d'Imagerie et de Recherche sur les Affections Locomotrices Equines (CIRALE), Ecole Nationale vétérinaire d'Alfort, 94700 Maisons-Alfort, France.
Hébert, Camille
  • LIM France, Labcom LIM-EnvA, 24300 Nontron, France.
Martin, Pauline
  • LIM France, Labcom LIM-EnvA, 24300 Nontron, France.
Marin, Frédéric
  • Laboratoire de BioMécanique et BioIngénierie (UMR CNRS 7338), Centre of Excellence for Human and Animal Movement Biomechanics (CoEMoB), Université de Technologie de Compiègne (UTC), Alliance Sorbonne Université, 60200 Compiègne, France.
Hanne-Poujade, Sandrine
  • LIM France, Labcom LIM-EnvA, 24300 Nontron, France.
Chateau, Henry
  • Centre d'Imagerie et de Recherche sur les Affections Locomotrices Equines (CIRALE), Ecole Nationale vétérinaire d'Alfort, 94700 Maisons-Alfort, France.

MeSH Terms

  • Animals
  • Horses
  • Support Vector Machine
  • Lameness, Animal / diagnosis
  • Lameness, Animal / physiopathology
  • Forelimb / physiology
  • Horse Diseases / diagnosis
  • Machine Learning
  • Hindlimb / physiology
  • Gait / physiology

Grant Funding

  • ANR 16-LCV2-0002-01 / Agence Nationale de la Recherche
  • 20E01636 / Ru00e9gion Normandie
  • 20E01636 / European Regional Development Fund

Conflict of Interest Statement

The project was supported by the Agence Nationale de la Recherche (ANR), which sponsors a collaborative project between a company (LIM France) and the Ecole Nationale Vétérinaire d’Alfort (ENVA).

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