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Author  |
Hodson, E.F.; Clayton, H.M.; Lanovaz, J.L. |
| Title |
Temporal analysis of walk movements in the Grand Prix dressage test at the 1996 Olympic Games |
Type |
Journal Article |
| Year |
1999 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
62 |
Issue |
2-3 |
Pages |
89-97 |
| Keywords |
Dressage; Horse; Kinematics; Locomotion; Gait |
| Abstract |
Video analysis was used to measure temporal characteristics of the collected walk, extended walk and half pirouette at walk of eleven competitors during the team dressage competition at the 1996 Summer Olympic Games in Atlanta, GA. Forelimb stance durations, hind limb stance durations, lateral step intervals and diagonal step intervals were symmetrical for the right and left sides in the collected and extended walk strides, but there were left-right asymmetries in the forelimb stance duration and in the lateral step interval in the half pirouette strides. For both collected and extended walk strides, hind limb stance duration was significantly longer than forelimb stance duration. The mean values for the group of eleven horses showed that the collected and extended walks had a regular rhythm. The half pirouette strides showed an irregularity in which there was a short interval between footfalls of the outside forelimb and inside hind limb, and along interval between footfalls of the inside hind limb and inside forelimb. This irregularity reflected an early placement of the inside hind limb. The stance times of both hind limbs were prolonged and this finding, in combination with the early placement of the inside hind limb, led to an increase in the period of tripedal support in each stride of the half pirouette. This was interpreted as a means of maintaining the horses' balance in the absence of forward movement. |
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refbase @ user @ |
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3960 |
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h:, M.; Lévy, F.; Fortin, M.; Leterrier, C.; LansadLansade, L. |
| Title |
Stress and temperament affect working memory performance for disappearing food in horses, Equus caballus |
Type |
Journal Article |
| Year |
2013 |
Publication |
Animal Behaviour |
Abbreviated Journal |
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| Volume |
86 |
Issue |
6 |
Pages |
1233-1240 |
| Keywords |
delayed-response task emotion; equid; Equus caballus; fearfulness; individual difference; personality; stress; temperament |
| Abstract |
In the present study, we sought to determine the influence of stress and temperament on working memory for disappearing food in horses. After assessment of five dimensions of temperament, we tested working memory of horses using a delayed-response task requiring a choice between two food locations. Delays ranging from 0 to 20 s were tested. The duration of working memory for disappearing food was first characterized without stressors (N = 26). The horses were then divided into two groups and their performance was assessed under stressful (exposure to acute stressors prior to testing, N = 12) or control conditions (N = 12). Results showed that the duration of working memory for disappearing food lasted at least 20 s under nonstressful conditions, and that under stressful conditions this duration lasted less than 12 s. This stress-induced impairment confirms in a nonrodent species that working memory performance is very sensitive to exposure to stressors. In addition, working memory performance in horses is influenced by the temperamental dimension of fearfulness according to the state of stress: fearful horses showed better performance under control conditions and worse performance under stressful conditions than nonfearful horses. These findings are discussed in the context of the Yerkes–Dodson law of stress and performance. |
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0003-3472 |
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Equine Behaviour @ team @ |
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5746 |
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Goursot, C.; Düpjan, S.; Puppe, B.; Leliveld, L.M.C. |
| Title |
Affective styles and emotional lateralization: A promising framework for animal welfare research |
Type |
Journal Article |
| Year |
2021 |
Publication |
Applied Animal Behaviour Science |
Abbreviated Journal |
Appl. Anim. Behav. Sci. |
| Volume |
237 |
Issue |
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Pages |
105279 |
| Keywords |
Individuality; Motor lateralization; Hemispheric dominance; Motivational tendencies; Emotional reactivity; Emotional regulation |
| Abstract |
The growing recognition of animals as individuals has broader implications for farm animal welfare research. Even under highly standardized on-farm conditions, farm animals show heterogeneous but individually consistent behavioural patterns towards various stimuli, based on how they appraise these stimuli. As a result, animal welfare is likely to be highly individual as well, and studying the proximate mechanisms underlying distinct individual behaviour patterns and appraisal will improve animal welfare research. We propose to extend the framework of affective styles to bridge the gap between existing research fields on animal personality and affective states. Affective styles refer to consistent individual differences in emotional reactivity and regulation and can be predicted by baseline cerebral lateralization. Likewise, animals with consistent left or right motor biases--a proxy measure of individual patterns in cerebral lateralization--have been shown to differ in their personality, emotional reactivity, motivational tendencies or coping styles. In this paper, we present the current knowledge of the links between laterality and stable individual traits in behaviour and affect in light of hypotheses on emotional lateralization. Within our suggested framework, we make recommendations on how to investigate affective styles in non-human animals and give practical examples. This approach has the potential to promote a science of affective styles in nonhuman animals and significantly advance research on animal welfare. |
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0168-1591 |
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Equine Behaviour @ team @ |
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6698 |
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| Author |
Goto, K.; Lea, S.E.G.; Dittrich, W.H. |
| Title |
Discrimination of intentional and random motion paths by pigeons |
Type |
Journal Article |
| Year |
2002 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
5 |
Issue |
3 |
Pages |
119-127 |
| Keywords |
Animals; *Columbidae; *Discrimination Learning; *Motion Perception; Recognition (Psychology) |
| Abstract |
Twelve pigeons ( Columba livia) were trained on a go/no-go schedule to discriminate between two kinds of movement patterns of dots, which to human observers appear to be “intentional” and “non-intentional” movements. In experiment 1, the intentional motion stimulus contained one dot (a “wolf”) that moved systematically towards another dot as though stalking it, and three distractors (“sheep”). The non-intentional motion stimulus consisted of four distractors but no stalker. Birds showed some improvement of discrimination as the sessions progressed, but high levels of discrimination were not reached. In experiment 2, the same birds were tested with different stimuli. The same parameters were used but the number of intentionally moving dots in the intentional motion stimulus was altered, so that three wolves stalked one sheep. Despite the enhanced difference of movement patterns, the birds did not show any further improvement in discrimination. However, birds for which the non-intentional stimulus was associated with reward showed a decline in discrimination. These results indicated that pigeons can discriminate between stimuli that do and do not contain an element that human observer see as moving intentionally. However, as no feature-positive effect was found in experiment 1, it is assumed that pigeons did not perceive or discriminate these stimuli on the basis that the intentional stimuli contained a feature that the non-intentional stimuli lacked, though the convergence seen in experiment 2 may have been an effective feature for the pigeons. Pigeons seem to be able to recognise some form of multiple simultaneously goal-directed motions, compared to random motions, as a distinctive feature, but do not seem to use simple “intentional” motion paths of two geometrical figures, embedded in random motions, as a feature whose presence or absence differentiates motion displays. |
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School of Psychology, University of Exeter, Washington Singer Laboratories, Exeter EX4 4QG, UK. K.Goto@exeter.ac.uk |
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1435-9448 |
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| Notes |
PMID:12357284 |
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no |
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Equine Behaviour @ team @ |
Serial |
2601 |
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| Author |
Galloux, P.; Barrey, E. |
| Title |
Components of the total kinetic moment in jumping horses |
Type |
Journal Article |
| Year |
1997 |
Publication |
Equine Veterinary Journal. Supplement |
Abbreviated Journal |
Equine Vet J Suppl |
| Volume |
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Issue |
23 |
Pages |
41-44 |
| Keywords |
Algorithms; Animals; Exertion/*physiology; Female; Gravitation; Horses/*physiology; Kinetics; Locomotion/*physiology; Male; Models, Biological; Movement/*physiology; Video Recording |
| Abstract |
Thirty horses were filmed with a panning camera operating at 50 frames/s as they jumped over a 1.20 x 1.20 m fence. The markers of 9 joints on the horse and 7 joints on the rider were tracked in 2D with the TrackEye system. The centre of gravity and moment of inertia of each segment were calculated using a geometric algorithm and a cylindric model, respectively. The kinetic moment of each part of the horse was calculated after filtering, and resampling of data. This method showed the relative contribution of each body segment to the body overall rotation during the take-off, jump and landing phases. It was found that the trunk, hindlimbs and head-neck had the greatest influence. The coordination between the motion of the body segments allowed the horse to control its angular speed of rotation over the fence. This remained nearly constant during the airborne phase (120 +/- 5 degrees/s). During the airborne phase, the kinetic moment was constant because its value was equal to the moment of the external forces (722 +/- 125 kg x m2/s). |
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Ecole Nationale d'Equitation, Terrefort, Saumur, France |
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PMID:9354287 |
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no |
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Equine Behaviour @ team @ |
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3797 |
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Fureix, C.; Pagès, M.; Bon, R.; Lassalle, J.-M.; Kuntz, P.; Gonzalez, G. |
| Title |
A preliminary study of the effects of handling type on horses' emotional reactivity and the human-horse relationship |
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Journal Article |
| Year |
2009 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
| Volume |
82 |
Issue |
2 |
Pages |
202-210 |
| Keywords |
Emotional reactivity; Handling style; Horse; Human-horse relationship |
| Abstract |
Handling is a crucial component of the human-horse relationship. Here, we report data from an experiment conducted to assess and compare the effect of two training methods. Two groups of six Welsh mares were trained during four sessions of 50 min, one handled with traditional exercises (halter leading, grooming/brushing, lifting feet, lunging and pseudo-saddling (using only girth and saddle pad) and the second group with natural horsemanship exercises (desensitization, yielding to body pressure, lunging and free-lunging). Emotional reactivity (ER) and the human-horse relationship (HHR) were assessed both prior to and following handling. A social isolation test, a neophobia test and a bridge test were used to assess ER. HHR was assessed through test of spontaneous approach to, and forced approach by, an unknown human. Horses' ER decreased after both types of handling as indicated by decreases in the occurrence of whinnying during stressful situations. Head movement (jerk/shake) was the most sensitive variable to handling type. In the spontaneous approach tests, horses in the traditional handling group showed higher latencies to approach a motionless person after handling than did the natural horsemanship group. Our study suggests that natural horsemanship exercises could be more efficient than traditional exercises for improving horses' HHR. |
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0376-6357 |
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Equine Behaviour @ team @ |
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5092 |
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Fruehwirth, B.; Peham, C.; Scheidl, M.; Schobesberger, H. |
| Title |
Evaluation of pressure distribution under an English saddle at walk, trot and canter |
Type |
Journal Article |
| Year |
2004 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
| Volume |
36 |
Issue |
8 |
Pages |
754-757 |
| Keywords |
Animals; Back/*physiology; Biomechanics; Body Weight/physiology; Exercise Test/veterinary; Gait/*physiology; Horses/*physiology; Humans; Locomotion/*physiology; Pressure |
| Abstract |
REASONS FOR PERFORMING STUDY: Basic information about the influence of a rider on the equine back is currently lacking. HYPOTHESIS: That pressure distribution under a saddle is different between the walk, trot and canter. METHODS: Twelve horses without clinical signs of back pain were ridden. At least 6 motion cycles at walk, trot and canter were measured kinematically. Using a saddle pad, the pressure distribution was recorded. The maximum overall force (MOF) and centre of pressure (COP) were calculated. The range of back movement was determined from a marker placed on the withers. RESULTS: MOF and COP showed a consistent time pattern in each gait. MOF was 12.1 +/- 1.2 and 243 +/- 4.6 N/kg at walk and trot, respectively, in the ridden horse. In the unridden horse MOF was 172.7 +/- 11.8 N (walk) and 302.4 +/- 33.9 N (trot). At ridden canter, MOF was 27.2 +/- 4.4 N/kg. The range of motion of the back of the ridden horse was significantly lower compared to the unridden, saddled horse. CONCLUSIONS AND POTENTIAL RELEVANCE: Analyses may help quantitative and objective evaluation of the interaction between rider and horse as mediated through the saddle. The information presented is therefore of importance to riders, saddlers and equine clinicians. With the technique used in this study, style, skill and training level of different riders can be quantified, which would give the opportunity to detect potentially harmful influences and create opportunities for improvement. |
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Movement Science Group, Department V, Clinic of Orthopaedics in Ungulates, University of Veterinary Medicine, Vienna, Austria |
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0425-1644 |
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PMID:15656510 |
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Equine Behaviour @ team @ |
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4041 |
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Fiset, S.; Landry, F.; Ouellette, M. |
| Title |
Egocentric search for disappearing objects in domestic dogs: evidence for a geometric hypothesis of direction |
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Journal Article |
| Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
9 |
Issue |
1 |
Pages |
1-12 |
| Keywords |
Animals; Dogs/*psychology; Female; Form Perception; Male; Mental Recall; *Motion Perception; Orientation; Problem Solving; *Space Perception |
| Abstract |
In several species, the ability to locate a disappearing object is an adaptive component of predatory and social behaviour. In domestic dogs, spatial memory for hidden objects is primarily based on an egocentric frame of reference. We investigated the geometric components of egocentric spatial information used by domestic dogs to locate an object they saw move and disappear. In experiment 1, the distance and the direction between the position of the animal and the hiding location were put in conflict. Results showed that the dogs primarily used the directional information between their own spatial coordinates and the target position. In experiment 2, the accuracy of the dogs in finding a hidden object by using directional information was estimated by manipulating the angular deviation between adjacent hiding locations and the position of the animal. Four angular deviations were tested: 5, 7.5, 10 and 15 degrees . Results showed that the performance of the dogs decreased as a function of the angular deviations but it clearly remained well above chance, revealing that the representation of the dogs for direction is precise. In the discussion, we examine how and why domestic dogs determine the direction in which they saw an object disappear. |
| Address |
Secteur Sciences Humaines, Universite de Moncton, Campus d'Edmundston, Edmundston, New-Brunswick, Canada E3V 2S8. sfiset@umce.ca |
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1435-9448 |
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PMID:15750805 |
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Equine Behaviour @ team @ |
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2489 |
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Farmer, K.; Krueger, K.; Byrne, R. |
| Title |
Visual laterality in the domestic horse (Equus caballus) interacting with humans |
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Journal Article |
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2010 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
| Volume |
13 |
Issue |
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Pages |
229-238 |
| Keywords |
Horse – Laterality – Eye preference – Emotion – Vision |
| Abstract |
Most horses have a side on which they are easier to handle and a direction they favour when working on a circle, and recent studies have suggested a correlation between emotion and visual laterality when horses observe inanimate objects. As such lateralisation could provide important clues regarding the horse’s cognitive processes, we investigated whether horses also show laterality in association with people. We gave horses the choice of entering a chute to left or right, with and without the passive, non-interactive presence of a person unknown to them. The left eye was preferred for scanning under both conditions, but significantly more so when a person was present. Traditionally, riders handle horses only from the left, so we repeated the experiment with horses specifically trained on both sides. Again, there was a consistent preference for left eye scanning in the presence of a person, whether known to the horses or not. We also examined horses interacting with a person, using both traditionally and bilaterally trained horses. Both groups showed left eye preference for viewing the person, regardless of training and test procedure. For those horses tested under both passive and interactive conditions, the left eye was preferred significantly more during interaction. We suggest that most horses prefer to use their left eye for assessment and evaluation, and that there is an emotional aspect to the choice which may be positive or negative, depending on the circumstances. We believe these results have important practical implications and that emotional laterality should be taken into account in training methods. |
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Equine Behaviour @ team @ |
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4953 |
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Faber, M.J.; van Weeren, P.R.; Schepers, M.; Barneveld, A. |
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Long-term follow-up of manipulative treatment in a horse with back problems |
Type |
Journal Article |
| Year |
2003 |
Publication |
Journal of Veterinary Medicine. A, Physiology, Pathology, Clinical Medicine |
Abbreviated Journal |
J Vet Med A Physiol Pathol Clin Med |
| Volume |
50 |
Issue |
5 |
Pages |
241-245 |
| Keywords |
Animals; Female; Horse Diseases/*physiopathology/*therapy; Horses; Manipulation, Spinal/*veterinary; Range of Motion, Articular; Scoliosis/physiopathology/therapy/*veterinary; Severity of Illness Index; Thoracic Vertebrae |
| Abstract |
In order to objectively quantify the effect of manipulation on back-related locomotion anomalies in the horse, a recently developed kinematic measuring technique for the objective quantification of thoracolumbar motion in the horse was applied in a dressage horse that was suffering from a back problem. In this horse, clinically, a right-convex bending (scoliosis) from the 10th thoracic vertebra to the second lumbar vertebra was diagnosed. As a result, there was a marked asymmetric movement of the thoracolumbar spine. Functionally, there was severe loss of performance. Thoracolumbar motion was measured in terms of ventrodorsal flexion, lateral flexion, and axial rotation using an automated gait analysis system. Measurements were repeated before and 2 days after treatment, before the second treatment 3 weeks later, and at 4 weeks and 8 months after the second treatment to assess long-term effect. At the same time, performance of the horse was assessed subjectively by the trainer as well. Symmetry of movement improved dramatically after the first treatment. After this, there was a slight decrease in symmetry, but 8 months after the last treatment the symmetry indexes for the various joints were still considerably better than during the first (pre-treatment) measuring session. Subjectively, the trainer did not notice improvement until after measurement session 4. Between sessions 4 and 5 (at 4 weeks and 8 months after the second treatment) there was a change of trainer. The new trainer did not report any back problem, and succeeded in bringing the horse back to its former level in competition. It is concluded that manipulation had a measurable influence on the kinematics of the thoracolumbar spine. However, it is recognized that an improvement in symmetry of motion is not equivalent to clinical improvement and that other measures, such as changes in management, may be more decisive. |
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Department of Equine Sciences, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands |
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English |
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0931-184X |
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PMID:14567510 |
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Equine Behaviour @ team @ |
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3720 |
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