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DOI: 10.3415/VCOT-11-07-0106
Caudal paw displacement during movement initiation and its implications for possible injury mechanisms
Publikationsverlauf
Received
22. Juli 2011
Accepted
24. Mai 2012
Publikationsdatum:
18. Dezember 2017 (online)
![](https://www.thieme-connect.de/media/10.1055-s-00035023/201205/lookinside/thumbnails/10-3415-vcot-11-07-0106-1.jpg)
Summary
Objectives: The purpose of this study was to quantify and determine the degree to which dogs experience negative displacement of the paw during movement initiation on natural surfaces, the frequency of that displacement, and whether or not the negative displacement could yield injuries.
Methods: Seven retired racing Greyhound dogs were selected to participate in sprint starts on two natural (non-vegetated and vegetated) surfaces. Kinematic analysis was conducted to quantify the displacements.
Results: All dogs in all trials experienced a negative paw displacement in at least one or more limbs. Significant effects were found for negative displacement across surfaces, limb, and for the surface x limb interactions. Rear paw negative displacement was -6.68 ± 2.55% body length (BL) for the non-vegetated surface and -5.29 ± 1.92% BL for the vegetated surface. Front paw negative displacement was -21.42 ± 2.62% BL for the non-vegetated surface and -17.25 ± 3.82% BL for the vegetated surface. There was no significant difference between average torso velocity on the two track surfaces. This study verified that the paw does negatively displace (moves backwards) during movement initiation. The magnitude of the displacements suggests that multiple injury mechanisms could be present.
Clinical relevance: These findings demonstrate the extreme kinematics placed on the canine body during movement initiation, which might further the understanding of the mechanism of injury and contribute to enhanced surgical and rehabilitation techniques.
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References
- 1 Nigg BM, Yeadon MR. Biomechanical aspects of playing surfaces. J Sports Sci 1987; 5: 117-145.
- 2 Ratzlaff MH, Hyde ML, Hutton DV. et al. Interrelationships between moisture content of the track, dynamic properties of the track, and the locomotor forces exerted by galloping horses. J Equine Vet Sci 1997; 17: 35-41.
- 3 Peterson ML, McIlwraith CW, Reiser RF. et al. System development for in-situ characterization of horse racing track surfaces. Biosystems Engineering 2008; 101: 260-269.
- 4 Robertson DG, Dowling JJ. Design and responses of butterworth and critically damped digital filters. J Electromyogr Kinesiol 2003; 13: 569-573.
- 5 Nigg BM. The validity and relevance of test used for the assessment of sports surfaces. Med Sci Sports Exerc 1990; 22: 131-139.
- 6 Harland MJ, Steel JR. Biomechanics of the sprint start. J Sports Med 1997; 23: 11-20.
- 7 Ford KR, Manson NA, Evans BJ. et al. Comparison of in-shoe foot loading patterns on natural grass and synthetic turf. J Sci Med Sport 2006; 9: 433-440.
- 8 Thomason JJ, Peterson ML. Biomechanical and mechanical investigations of the hoof-track interface in racing horses. Vet Clin N Am Equine Pract 2008; 24: 53-77.