Equine Neck Movement: Comparing Segmental Kinematics and Precission Recall of Trajectories and Velocities

Rebeka Zsoldos, Björn Krüger, Andreas Weber, and Theresia Licka
In proceedings of XXIV Congress of the International Society of Biomechanics (ISB 2013), Natal, Brazil, Aug. 2013
 

Abstract

The retrieval of 3D motion capture data is a well-established method in animation to find similar motion sequences in large databases. The aim of this study was to compare similarities of motion patterns of the equine head-neck-withers segment in five horses walking and trotting on a treadmill. Trajectories and velocities of skin markers (crista facialis, C1, C3, C6, withers, four hooves) were analyzed. Motion pattern similarities were higher at walk than at trot in all segments. At walk maximum precision (% retrieved instances that are relevant) was 66 %, and at trot maximum recall (% relevant instances that are retrieved) was 12%, both at C3-C6. Different to the larger kinematic variations of head and neck movement at walk, this approach of identifying the movement pattern as a whole showed a more consistent pattern of segmental movement at walk than at trot, illustrating the similarities in vertebral joint movements.

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Bibtex

@INPROCEEDINGS{zsoldos-2013-a,
     author = {Zsoldos, Rebeka and Kr{\"u}ger, Bj{\"o}rn and Weber, Andreas and Licka, Theresia},
      title = {Equine Neck Movement: Comparing Segmental Kinematics and Precission Recall of Trajectories and
               Velocities},
  booktitle = {XXIV Congress of the International Society of Biomechanics (ISB 2013)},
       year = {2013},
      month = aug,
   location = {Natal, Brazil},
   abstract = {The retrieval of 3D motion capture data is a well-established method in animation to find similar
               motion sequences in large databases. The aim of this study was to compare similarities of motion
               patterns of the equine head-neck-withers segment in five horses walking and trotting on a treadmill.
               Trajectories and velocities of skin markers (crista facialis, C1, C3, C6, withers, four hooves) were
               analyzed. Motion pattern similarities were higher at walk than at trot in all segments. At walk
               maximum precision (% retrieved instances that are relevant) was 66 %, and at trot maximum recall (%
               relevant instances that are retrieved) was 12%, both at C3-C6. Different to the larger kinematic
               variations of head and neck movement at walk, this approach of identifying the movement pattern as a
               whole showed a more consistent pattern of segmental movement at walk than at trot, illustrating the
               similarities in vertebral joint movements.}
}