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Rhodin, M.; Johnston, C.; Holm, K.R.; Wennerstrand, J.; Drevemo, S. |
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Title |
The influence of head and neck position on kinematics of the back in riding horses at the walk and trot |
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Journal Article |
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Year |
2005 |
Publication |
Equine Veterinary Journal |
Abbreviated Journal |
Equine Vet J |
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Volume |
37 |
Issue |
1 |
Pages |
7-11 |
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Keywords |
Acceleration; Animals; Back/*physiology; Biomechanics; Exercise Test/veterinary; Female; Gait/*physiology; Head/*physiology; Horses/*physiology; Male; Movement/physiology; Neck/*physiology; Walking/physiology |
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Abstract |
REASONS FOR PERFORMING STUDY: A common opinion among riders and in the literature is that the positioning of the head and neck influences the back of the horse, but this has not yet been measured objectively. OBJECTIVES: To evaluate the effect of head and neck position on the kinematics of the back in riding horses. METHODS: Eight Warmblood riding horses in regular work were studied on a treadmill at walk and trot with the head and neck in 3 different predetermined positions achieved by side reins attached to the bit and to an anticast roller. The 3-dimensional movement of the thoracolumbar spine was measured from the position of skin-fixed markers recorded by infrared videocameras. RESULTS: Head and neck position influenced the movements of the back, especially at the walk. When the head was fixed in a high position at the walk, the flexion-extension movement and lateral bending of the lumbar back, as well as the axial rotation, were significantly reduced when compared to movements with the head free or in a low position. At walk, head and neck position also significantly influenced stride length, which was shortest with the head in a high position. At trot, the stride length was independent of head position. CONCLUSIONS: Restricting and restraining the position and movement of the head and neck alters the movement of the back and stride characteristics. With the head and neck in a high position stride length and flexion and extension of the caudal back were significantly reduced. POTENTIAL RELEVANCE: Use of side reins in training and rehabilitation programmes should be used with an understanding of the possible effects on the horse's back. |
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Department of Anatomy, Swedish University of Agricultural Sciences, 750 07 Uppsala, Sweden |
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0425-1644 |
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PMID:15651727 |
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Equine Behaviour @ team @ |
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3657 |
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Author |
König, H.E.; Wissdorf, H.; Probst, A.; Macher, R.; Voß, S.; Polsterer, E. |
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Title |
Considerations about the function of the mimic muscles and the vomeronasal organ of horses during the Flehmen reaction |
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Journal Article |
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Year |
2005 |
Publication |
Pferdeheilkunde |
Abbreviated Journal |
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Volume |
21 |
Issue |
4 |
Pages |
297-300 |
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Keywords |
Anatomy; Behaviour; Flehmen reaction; Horse; Vomeronasal organ |
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Abstract |
Additional to the olfactory epithelium, the equine vomeronasal organ serves to the perception of odorous substances and specially for pheromones. In a middle-size horse this organ has an extension in length from an imaginary transverse plane about 10 cm caudally the nostrils to a transverse plane through the middle of the second premolar tooth. During the Flehmen reaction the levator labii superior, nasolabial, caninus and lateralis nasi muscles contract. The upper lip and the tip of the nose are lifted. The opening of the nostrils is narrowed, caused by the convergence of the plate and horn of the alar cartilage. In this manner in case of Flehmen reaction air is directly conducted towards the opening of the vomeronasal organ into the nasal cavity during inspiration. During the “Flehmen” horses assume a characteristic posture. |
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Department für Pathobiologie (Institut für Anatomie), Veterinärmedizinische Universität Wien, Veterinärplatz 1, A-1210 Wien, Austria |
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Export Date: 21 October 2008; Source: Scopus |
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yes |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4554 |
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Author |
Whiten, A.; Horner, V.; Litchfield, C.A.; Marshall-Pescini, S. |
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Title |
How do apes ape? |
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Journal Article |
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Year |
2004 |
Publication |
Learning & Behavior |
Abbreviated Journal |
Learn. Behav. |
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Volume |
32 |
Issue |
1 |
Pages |
36-52 |
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Keywords |
Adaptation, Psychological; Animals; Behavior, Animal; Hominidae/*psychology; *Imitative Behavior; Imprinting (Psychology); *Learning; Psychological Theory; *Social Environment; *Social Facilitation |
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Abstract |
In the wake of telling critiques of the foundations on which earlier conclusions were based, the last 15 years have witnessed a renaissance in the study of social learning in apes. As a result, we are able to review 31 experimental studies from this period in which social learning in chimpanzees, gorillas, and orangutans has been investigated. The principal question framed at the beginning of this era, Do apes ape? has been answered in the affirmative, at least in certain conditions. The more interesting question now is, thus, How do apes ape? Answering this question has engendered richer taxonomies of the range of social-learning processes at work and new methodologies to uncover them. Together, these studies suggest that apes ape by employing a portfolio of alternative social-learning processes in flexibly adaptive ways, in conjunction with nonsocial learning. We conclude by sketching the kind of decision tree that appears to underlie the deployment of these alternatives. |
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Centre for Social Learning and Cognitive Evolution, Scottish Primate Research Group, School of Psychology, University of St. Andrews, St. Andrews, Fife, Scotland. a.whiten@st-and.ac.uk |
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1543-4494 |
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PMID:15161139 |
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no |
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Call Number |
refbase @ user @ |
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734 |
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Author |
Horner, V.; Whiten, A. |
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Title |
Learning from others' mistakes limits on understanding a trap-tube task by young chimpanzees (Pan troglodytes) and children (Homo sapiens) |
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Journal Article |
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Year |
2007 |
Publication |
Journal of comparative psychology |
Abbreviated Journal |
J Comp Psychol |
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Volume |
121 |
Issue |
1 |
Pages |
12-21 |
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A trap-tube task was used to determine whether chimpanzees (Pan troglodytes) and children (Homo sapiens) who observed a model's errors and successes could master the task in fewer trials than those who saw only successes. Two- to 7-year-old chimpanzees and 3- to 4-year-old children did not benefit from observing errors and found the task difficult. Two of the 6 chimpanzees developed a successful anticipatory strategy but showed no evidence of representing the core causal relations involved in trapping. Three- to 4-year-old children showed a similar limitation and tended to copy the actions of the demonstrator, irrespective of their causal relevance. Five- to 6-year-old children were able to master the task but did not appear to be influenced by social learning or benefit from observing errors. |
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Centre for Social Learning and Cognitive Evolution, School of Psychology, University of St Andrews, Fife, Scotland, UK. vhorner@rmy.emory.edu |
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Washington, D.C. : 1983 |
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English |
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0735-7036 |
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Notes |
PMID:17324071 |
Approved |
yes |
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Call Number |
refbase @ user @ |
Serial |
728 |
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Author |
Caldwell, C.A.; Whiten, A. |
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Title |
Testing for social learning and imitation in common marmosets, Callithrix jacchus, using an artificial fruit |
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Journal Article |
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Year |
2004 |
Publication |
Animal cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
7 |
Issue |
2 |
Pages |
77-85 |
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Keywords |
Animals; *Association Learning; Callithrix/*psychology; Discrimination Learning; *Feeding Behavior; Female; Food Preferences; Fruit; *Imitative Behavior; Male; *Social Behavior; Social Environment |
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Abstract |
We tested for social learning and imitation in common marmosets using an artificial foraging task and trained conspecific demonstrators. We trained a demonstrator marmoset to open an artificial fruit, providing a full demonstration of the task to be learned. Another marmoset provided a partial demonstration, controlling for stimulus enhancement effects, by eating food from the outside of the apparatus. We thus compared three observer groups, each consisting of four animals: those that received the full demonstration, those that received the partial demonstration, and a control group that saw no demonstration prior to testing. Although none of the observer marmosets succeeded in opening the artificial fruit during the test periods, there were clear effects of demonstration type. Those that saw the full demonstration manipulated the apparatus more overall, whereas those from the control group manipulated it the least of the three groups. Those from the full-demonstration group also contacted the particular parts of the artificial fruit that they had seen touched (localised stimulus enhancement) to a greater extent than the other two groups. There was also an interaction between the number of hand and mouth touches made to the artificial fruit for the full- and partial-demonstration groups. Whether or not these data represent evidence for imitation is discussed. We also propose that the clear differences between the groups suggest that social learning mechanisms provide real benefits to these animals in terms of developing novel food-processing skills analogous to the one presented here. |
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Centre for Social Learning and Cognitive Evolution and Scottish Primate Research Group, University of St Andrews, KY16 9JU, St Andrews, Fife, Scotland. C.A.Caldwell@exeter.ac.uk |
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1435-9448 |
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PMID:15069606 |
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no |
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refbase @ user @ |
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735 |
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Author |
Branson, N.J.; Rogers, L.J. |
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Title |
Relationship between paw preference strength and noise phobia in Canis familiaris |
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Journal Article |
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Year |
2006 |
Publication |
Journal of Comparative Psychology |
Abbreviated Journal |
J. Comp. Psychol. |
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Volume |
120 |
Issue |
3 |
Pages |
176-183 |
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noise phobia; lateralization; paw preference; dog; fear |
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The authors investigated the relationship between degree of lateralization and noise phobia in 48 domestic dogs (Canis familiaris) by scoring paw preference to hold a food object and relating it to reactivity to the sounds of thunderstorms and fireworks, measured by playback and a questionnaire. The dogs without a significant paw preference were significantly more reactive to the sounds than the dogs with either a left-paw or right-paw preference. Intense reactivity, therefore, is associated with a weaker strength of cerebral lateralization. The authors note the similarity between their finding and the weaker hand preferences shown in humans suffering extreme levels of anxiety and suggest neural mechanisms that may be involved. (PsycINFO Database Record (c) 2010 APA, all rights reserved) |
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Branson, N. J.: Centre for Neuroscience and Animal Behavior, School of Biological, Biomedical and Molecular Sciences, University of New England, Armidale, NSW, Australia, nbranson@une.edu.au |
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US: American Psychological Association |
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1939-2087 (Electronic); 0735-7036 (Print) |
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no |
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Equine Behaviour @ team @ 2006-09888-002 |
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5384 |
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Author |
Blunden, A.S.; Smith, K.C.; Whitwell, K.E.; Dunn, K.A. |
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Title |
Systemic infection by equid herpesvirus-1 in a Grevy's zebra stallion (Equus grevyi) with particular reference to genital pathology |
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Journal Article |
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Year |
1998 |
Publication |
Journal of Comparative Pathology |
Abbreviated Journal |
J Comp Pathol |
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119 |
Issue |
4 |
Pages |
485-493 |
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Animals; Animals, Zoo; Epididymis/pathology/virology; Equidae/*virology; Herpesviridae Infections/diagnosis/pathology/*veterinary; Herpesvirus 1, Equid/isolation & purification/*pathogenicity; Lymph Nodes/pathology/virology; Male; Nasal Mucosa/pathology/virology; Pulmonary Edema/pathology; Spleen/virology; Testis/*pathology/virology |
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A severe multi-systemic form of equid herpesvirus-1 infection is described in an adult zebra stallion. There was multifocal necrotizing rhinitis, marked hydrothorax and pulmonary oedema, with viral antigen expression in degenerating epithelial cells, local endothelial cells and intravascular leucocytes of the nasal mucosa and lung. Specific localization of EHV-1 infection was seen in the testes and epididymides, including infection of Leydig cells and germinal epithelium, which would have facilitated venereal shedding of virus in life. The case provided a unique opportunity to study hitherto undescribed aspects of the pathogenesis of naturally occurring EHV-1 infection in the male equine genital tract. Restriction digests of the isolate demonstrated a pattern similar to that of EHV-1 isolates previously recovered from aborted zebra and onager fetuses. |
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Animal Health Trust Centre for Preventive Medicine, Newmarket, Suffolk, UK |
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0021-9975 |
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PMID:9839210 |
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no |
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Call Number |
Equine Behaviour @ team @ |
Serial |
2239 |
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Author |
McDonnell, S.M. (ed) |
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Title |
The Equid Ethogram: A Practical Field Guide to Horse Behavior |
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Book Whole |
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2003 |
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Eclipse Press |
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Lexington, Kentucky |
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McDonnell, S.M. |
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978-1581500905 |
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refbase @ user @ |
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711 |
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Author |
Treichler, F.R.; Van Tilburg, D. |
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Concurrent Conditional Discrimination Tests of Transitive Inference by Macaque Monkeys: List Linking |
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Journal Article |
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Year |
1996 |
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Journal of Experimental Psychology: Animal Behavior Processes |
Abbreviated Journal |
J Exp Psychol Anim Behav Process |
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22 |
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1 |
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105-117 |
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Processing of serial information was assessed by training six macaques on a five-item list of objects arranged into the four conditional pairs, A-B+, B-C+, C-D+, and D-E+. An analogous list (F through J) was similarly trained. Subsequently, both lists were linked by training on E-F+, a pair that provided adjacent elements from each list. Then, all unique and trained object pairs from both lists were presented as a test. Results indicated that the objects were retained as a single, linearly organized list with choice accuracy directly related to interitem distance between paired objects. A second experiment explored the consequences of incidence of conflicting information on list organization. In both experiments, selections depended on representational processes and supported the view that monkeys and pigeons retain serial lists in qualitatively different ways. |
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refbase @ user @ |
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718 |
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Tyler, S.J. |
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The behaviour and social organisation of the new Forest ponies |
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1972 |
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Animal Behaviour Monograph |
Abbreviated Journal |
Anim. Behav. Monogr. |
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5 |
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2 |
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85-196 |
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refbase @ user @; Equine Behaviour @ team @ room B 3.029 |
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719 |
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