Gait analysis

Authors: H. M. CLAYTON, M. LAVAGNINO, L. J. KAISER, N. C. STUBBS
Journal: Equine Veterinary Journal

Reasons for performing study: It is considered that specific exercises to strengthen limb musculature would be helpful.

Objective: To describe swing phase kinematic and kinetic changes in the hindlimbs of trotting horses in response to the addition of leg weights to the hind pasterns.

Category: Equine - Gait analysis
Authors: L. A. HEAPS, S. H. FRANKLIN, G. R. COLBORNE
Journal: Equine Veterinary Journal

Reasons for performing study: Recent research indicates that the digital joints experience some degree of extrasagittal motion during stance and that the moments under the hoof are asymmetric in horses walking in a straight line. On a circle, these have not been defined.

Objectives: To quantify the amplitude and symmetry of horizontal twisting moments around the vertical axis through the hoof's centre of pressure on left and right circles at walk.

Category: Equine - Gait analysis
Authors: Maarten Oosterlinck, Frederik Pille, Tsjester Huppes, Frank Gasthuys, Willem Back
Journal: The Veterinary Journal

Modern pressure plates (PP) could be an alternative to traditional force plates (FP) for quantitative equine gait analysis, thereby providing the clinician with objective data on the horse’s gait while unravelling the loading of different regions of the hoof during the stance phase. The aim of this study was to determine whether a stand-alone PP allows reliable measurement of gait kinetics, compared to simultaneously recorded FP variables.

Category: Equine - Gait analysis
Authors: Jose M. Vilar, Francisco Miró, Angelo Santana, Giuseppe Spinella
Journal: Journal of Equine Veterinary Science

With the aim of evaluating equine performance in competitive trotter horses under normal racing conditions data of stride length, stride frequency and mean horses speed were obtained from 50, 2-year-old Italian winner fillies during the racing and the sprint laps of competition. The enhancement of speed in the sprint lap was obtained by increasing both stride length and stride frequency.

Category: Equine - Gait analysis
Authors: Jonathan S. Merritt, PhD; Marcus G. Pandy, PhD; Nicholas A. T. Brown, PhD; Colin R. Burvill, PhD; Christopher E. Kawcak, DVM, PhD; C. Wayne McIlwraith, BVSc, PhD, DSc; Helen M. S. Davies, PhD
Journal: American Journal of Veterinary Research

Objective—To assess the net mechanical load on the distal end of the third metacarpal bone in horses during walking and trotting.

Animals—3 Quarter Horses and 1 Thoroughbred.

Category: Bone - Equine - Gait analysis
Authors: Ferrari, M.; Pfau, T.; Wilson, A.M.; Weller, R.
Journal: Equine Veterinary Journal

Reasons for performing study: The influence of training on stride parameters is controversial and to date there is no information on how training influences stride parameters during high-speed locomotion in the field.

Objective: To determine the influence of training on stride variables during high-speed locomotion in Thoroughbred racehorses.

Methods: Speed, stride frequency, stance and protraction times were quantified in 8 Thoroughbreds with foot mounted accelerometers and GPS sensors during their first week of canter after the summer break and 6 months into training.

Category: Equine - Gait analysis
Authors: de Cocq, P.; Prinsen, H.; Springer, N.C.N.; van Weeren, P. R.; Schreuder, M.; Muller, M.; van Leeuwen, J. L.
Journal: Equine Veterinary Journal

Reason for performing study: During trot, the rider can either rise from the saddle during every stride or remain seated. Rising trot is used frequently because it is widely assumed that it decreases the loading of the equine back. This has, however, not been demonstrated in an objective study.

Objective: To determine the effects of rising and sitting trot on the movements of the horse.

Hypothesis: Sitting trot has more extending effect on the horse's back than rising trot and also results in a higher head and neck position.

Category: Equine - Gait analysis
Authors: Akikazu Ishihara, BVSc; Stephen M. Reed, DVM, DACVIM; Päivi J. Rajala-Schultz, DVM, PhD; James T. Robertson, DVM, DACVS; Alicia L. Bertone, DVM, PhD, DACVS
Journal: Journal of the American Veterinary Medical Association

Objective—To evaluate use of kinetic gait analysis for detection, quantification, and differentiation of hind limb lameness and spinal ataxia in horses.

Design—Prospective clinical study.

Animals—36 horses.

Procedures—Kinetic gait analysis with a force plate was performed for 12 clinically normal horses, 12 horses with hind limb lameness, and 12 horses with spinal ataxia. Kinetic variables were compared among groups, correlated to subjective grading, and used to build predictive models to assess the accuracy of discrimination.

Category: Equine - Gait analysis
Authors: Wijnberg, I.D.; Schrama, S.E.A.; Elgersma, A.E.; Maree, J.T.M.; de Cocq, P.; Back, W.
Journal: Equine Veterinary Journal

Reasons for performing the study: Therapeutic options for stringhalt in horses are limited, whereas medical experiences with botulinum toxin type A (Botox) have been positive. To evaluate its effectiveness in horses, surface electromyography (sEMG) signals before and after injection need to be quantified.

Hypothesis: Treatment of healthy ponies and cases with Botox should reduce muscle activity in injected muscles and reduce spastic movements without adverse side effects.

Category: Equine - Gait analysis
Authors: Back, W.; MacAllister, C.G.; van Heel, M. C. V.; Pollmeier, M.; Hanson, P.D.
Journal: Equine Veterinary Journal

Reasons for performing study: Lameness is a highly prevalent condition in horses and the principal cause of removal from athletic activity. In clinical studies to evaluate nonsteroidal anti-inflammatory drug therapies, force plates are commonly used to assess improvement of lameness objectively.

Hypothesis: To use a force plate to determine the optimal dose of a new COX-2 inhibitor (firocoxib) that will reduce lameness, when administered orally to horses once daily.

Category: Equine - Gait analysis