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Petter-Puchner, A.H.; Froetscher, W.; Krametter-Froetscher, R.; Lorinson, D.; Redl, H.; van Griensven, M. |
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Title  |
The long-term neurocompatibility of human fibrin sealant and equine collagen as biomatrices in experimental spinal cord injury |
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Journal Article |
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Year |
2007 |
Publication |
Experimental and Toxicologic Pathology : Official Journal of the Gesellschaft fur Toxikologische Pathologie |
Abbreviated Journal |
Exp Toxicol Pathol |
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Volume |
58 |
Issue |
4 |
Pages |
237-245 |
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Animals; Axotomy; Biocompatible Materials/*therapeutic use; Collagen/*therapeutic use; Fibrin Tissue Adhesive/*therapeutic use; Horses; Humans; Immunohistochemistry; Male; Motor Activity/physiology; Nerve Regeneration/*physiology; Rats; Recovery of Function; Spinal Cord/pathology/physiology; Spinal Cord Injuries/pathology/*therapy; Thoracic Vertebrae |
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INTRODUCTION: While fibrin sealant (FS) and equine collagen (EC) have been used as scaffold materials in experimental spinal cord injury (SCI), questions concerning neurocompatibility still remain. In this study, we assessed potential adverse effects, as well as functional and histological impact of FS and EC in subtotal hemisection of the thoracic spinal cord (SC) in rats. METHODS: 124 male rats were randomly assigned to four main groups (n=31): Sham (SH), Lesion only (L), fibrin sealant (GFS) and equine collagen group (GEC). SH animals received laminectomy only; all other animals underwent subtotal lateral hemisection at T9. Treatment consisted of application of FS or EC into the lesion gap in GFS and GEC, which was left empty in L. GFS, GEC, L and SH were each further divided into 4 subgroups: One subgroup, consisting of 10 rats was subjected to behavioural and reflex testing before surgery and followed up on days 1,7, 14, 21, 28 post op and then sacrificed. Haemalaun or cresyl violet (CV) was used to identify neutrophils in parasagittal cord sections which were obtained on day 1 (n=7). Sections stained for quantification of microglia/macrophages using ED-1 on day 3 (n=7), day 7 (n=7) and day 28 (n=7 out of 10). Additionally, neural filament (NF) staining was chosen to detect axonal regeneration and the length of ingrowth into FS and EC, Luxol blue for myelination, Von Willebrand factor for vascularisation, and glial fibrillary acidic protein (GFAP) staining for detection of astrocytes in glial scars on day 28. RESULTS: No adverse effects were observed in the treatment groups. Compared to L, GFS and GEC performed significantly better in the Basso, Beattie, Bresnahan (BBB) score and hopping responses. Proprioceptive placing was markedly improved in FS and EC compared to L. Axonal regrowth was found in GFS and GEC--the regrowth in the GFS was accompanied by myelination and vascularisation. Glial scarring occurred in all groups. Discussion Both biomatrices improved functional recovery compared to L and no adverse effects were perceived. |
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Ludwig Boltzmann Institute of Experimental and Clinical Traumatology, Donaueschingenstrasse 13, 1200-Vienna, Austria |
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0940-2993 |
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PMID:17118635 |
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1852 |
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Lea, S.E.G.; Goto, K.; Osthaus, B.; Ryan, C.M.E. |
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Title |
The logic of the stimulus |
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Journal Article |
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Year |
2006 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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Volume |
9 |
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4 |
Pages |
247-256 |
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Animals; Behavior, Animal/*physiology; Cognition/*physiology; Columbidae; Comprehension/physiology; Dogs; Humans; *Logic; Pattern Recognition, Visual/physiology; Perception/*physiology; Problem Solving/*physiology; Species Specificity |
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This paper examines the contribution of stimulus processing to animal logics. In the classic functionalist S-O-R view of learning (and cognition), stimuli provide the raw material to which the organism applies its cognitive processes-its logic, which may be taxon-specific. Stimuli may contribute to the logic of the organism's response, and may do so in taxon-specific ways. Firstly, any non-trivial stimulus has an internal organization that may constrain or bias the way that the organism addresses it; since stimuli can only be defined relative to the organism's perceptual apparatus, and this apparatus is taxon-specific, such constraints or biases will often be taxon-specific. Secondly, the representation of a stimulus that the perceptual system builds, and the analysis it makes of this representation, may provide a model for the synthesis and analysis done at a more cognitive level. Such a model is plausible for evolutionary reasons: perceptual analysis was probably perfected before cognitive analysis in the evolutionary history of the vertebrates. Like stimulus-driven analysis, such perceptually modelled cognition may be taxon-specific because of the taxon-specificity of the perceptual apparatus. However, it may also be the case that different taxa are able to free themselves from the stimulus logic, and therefore apply a more abstract logic, to different extents. This thesis is defended with reference to two examples of cases where animals' cognitive logic seems to be isomorphic with perceptual logic, specifically in the case of pigeons' attention to global and local information in visual stimuli, and dogs' failure to comprehend means-end relationships in string-pulling tasks. |
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School of Psychology, Washington Singer Laboratories, University of Exeter, Exeter, EX4 4QG, United Kingdom. s.e.g.lea@exeter.ac.uk |
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1435-9448 |
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PMID:16909234 |
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Equine Behaviour @ team @ |
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2450 |
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Cattell, R.B.; Korth, B. |
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Title |
The isolation of temperament dimensions in dogs |
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Journal Article |
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Year |
1973 |
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Behavioral Biology |
Abbreviated Journal |
Behav Biol |
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9 |
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1 |
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15-30 |
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Aggression; Animals; *Behavior, Animal; Biometry; Body Weight; *Dogs; Emotions; Factor Analysis, Statistical; Female; Genetics, Behavioral; Heart Rate; Humans; Intelligence; Male; Models, Psychological; *Personality; Problem Solving; Social Behavior |
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0091-6773 |
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PMID:4738708 |
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Equine Behaviour @ team @ |
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4140 |
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Author |
de Waal, F.B. |
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Title |
The integration of dominance and social bonding in primates |
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Journal Article |
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Year |
1986 |
Publication |
The Quarterly review of biology |
Abbreviated Journal |
Q Rev Biol |
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61 |
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4 |
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459-479 |
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Animals; Female; Humans; Male; *Object Attachment; *Primates; *Social Dominance |
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Social dominance is usually viewed from the perspective of intragroup competition over access to limited resources. The present paper, while not denying the importance of such competition, discusses the dominance concept among monkeys and apes in the context of affiliative bonding, social tolerance, and the reconciliation of aggressive conflicts. Two basic proximate mechanisms are supposed to provide a link between dominance and interindividual affiliation, namely, formalization of the dominance relationship (i.e., unequivocal communication of status), and conditional reassurance (i.e., the linkage of friendly coexistence to formalization of the relationship). Ritualized submission is imposed upon losers of dominance struggles by winners; losers are offered a “choice” between continued hostility or a tolerant relationship with a clearly signalled difference in status. If these two social mechanisms are lacking, aggression is bound to have dispersive effects. In their presence, aggression becomes a well-integrated, even constructive component of social life. In some higher primates this process of integration has reached the stage where status differences are strongly attenuated. In these species, sharing and trading can take the place of overt competition. The views underlying this “reconciled hierarchy” model are only partly new, as is evident from a review of the ethological literature. Many points are illustrated with data on a large semi-captive colony of chimpanzees (Pan troglodytes), particularly data related to striving for status, reconciliation behavior, and general association patterns. These observations demonstrate that relationships among adult male chimpanzees cannot be described in terms of a dichotomy between affiliative and antagonistic tendencies. Male bonding in this species has not been achieved by an elimination of aggression, but by a set of powerful buffering mechanisms that mitigate its effects. Although female chimpanzees do exhibit a potential for bonding under noncompetitive conditions, they appear to lack the buffering mechanisms of the males. |
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0033-5770 |
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PMID:3543991 |
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refbase @ user @ |
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210 |
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Robinson, I.H. |
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Title |
The human-horse relationship: how much do we know? |
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Journal Article |
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1999 |
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Equine Veterinary Journal. Supplement |
Abbreviated Journal |
Equine Vet J Suppl |
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28 |
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42-45 |
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*Animal Husbandry/economics; Animals; *Bonding, Human-Pet; Cost-Benefit Analysis; Hobbies; *Horses; Humans; Power (Psychology); Sports |
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Human relationships or interactions with horses have varied throughout history depending on human needs, but it is horses' ability to carry a human individual that has had perhaps the greatest impact on their relationship with man. Despite our long association with the horse, there have been few studies on human-horse relationships. There is little historical evidence on individual relationships with horses but indications of strong human-horse relationships have been noted in mounted societies, such as North American Plains Indians. Riding a horse has traditionally been associated with power, and was reserved for the ruling elite in many areas. Demographic data suggest that human relationships with horses may have changed in recent times. Although the lack of land and the relatively high cost of horse care may reduce the possibility of ownership for many people, the availability of riding establishments and increases in leisure time mean that riding is no longer restricted to the upper classes. There is a wide range in type and intensity of potential interactions with horses, indicating that human-horse relationships are likely to vary considerably. Some people appear to sacrifice a great deal in order to own a horse. However, the motivation behind these activities and the process by which an individual assesses personal costs of ownership versus their perceived benefits remains to be studied. Future research should focus on characterising the human-horse relationship, and the degree of individual and cultural variation. A greater understanding of horse owner perceptions of 'costs' versus 'benefits' may also increase our understanding of the relationship and the economic importance of horses in society. |
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WALTHAM Centre for Pet Nutrition, Freeby Lane, Waltham-on-the-Wolds, Leics LE14 4RT, UK |
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PMID:11314234 |
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Equine Behaviour @ team @ |
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4361 |
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Author |
Weiss, A.; King, J.E.; Figueredo, A.J. |
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Title |
The heritability of personality factors in chimpanzees (Pan troglodytes) |
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Journal Article |
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Year |
2000 |
Publication |
Behavior Genetics |
Abbreviated Journal |
Behav Genet |
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30 |
Issue |
3 |
Pages |
213-221 |
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Keywords |
Animals; Female; Humans; Male; Models, Genetic; Pan troglodytes/*genetics; Personality/*genetics; Social Environment |
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Human personality and behavior genetic studies have resulted in a growing consensus that five heritable factors account for most variance in human personality. Prior research showed that chimpanzee personality is composed of a dominance-related factor and five human-like factors--Surgency, Dependability, Emotional Stability, Agreeableness, and Openness. Genetic, shared zoo, and nonshared environmental variance components of the six factors were estimated by regressing squared phenotypic differences of all possible pairs of chimpanzees onto 1 – Rij, where Rij equals the degree of relationship and a variable indicating whether the pair was housed in the same zoo. Dominance showed significant narrow-sense heritability. Shared zoo effects accounted for only a negligible proportion of the variance for all factors. |
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Department of Psychology, University of Arizona, Tucson 85721, USA. aweiss@u.arizona.edu |
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0001-8244 |
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PMID:11105395 |
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Equine Behaviour @ team @ |
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4143 |
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Morley, K.I.; Montgomery, G.W. |
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The genetics of cognitive processes: candidate genes in humans and animals |
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Journal Article |
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Year |
2001 |
Publication |
Behavior Genetics |
Abbreviated Journal |
Behav Genet |
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31 |
Issue |
6 |
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511-531 |
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Animals; *Chromosome Mapping; Drosophila melanogaster; Genetic Markers/*genetics; Humans; Intelligence/*genetics; Mental Retardation/genetics; Mice; Phenotype; Quantitative Trait, Heritable |
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It has been hypothesized that numerous genes contribute to individual variation in human cognition. An extensive search of the scientific literature was undertaken to identify candidate genes which might contribute to this complex trait. A list of over 150 candidate genes that may influence some aspect of cognition was compiled. Some genes are particularly strong candidates based on evidence for involvement in cognitive processes in humans, mice, and Drosophila melanogaster. This survey confirms that many genes are associated with cognitive variation and highlights the potential importance of animal models in the study of human cognition. |
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Genetic Epidemiology Laboratory, Queensland Institute of Medical Research, Brisbane, Australia |
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0001-8244 |
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PMID:11838530 |
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Equine Behaviour @ team @ |
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4141 |
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Hamilton, W.D. |
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Title |
The genetical evolution of social behaviour. I |
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Journal Article |
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Year |
1964 |
Publication |
Journal of Theoretical Biology |
Abbreviated Journal |
J. Theor. Biol. |
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7 |
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1and 2 |
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1-52 |
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*Behavior; *Genetics; Humans; *Models, Theoretical |
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A genetical mathematical model is described which allows for interactions between relatives on one another's fitness. Making use of Wright's Coefficient of Relationship as the measure of the proportion of replica genes in a relative, a quantity is found which incorporates the maximizing property of Darwinian fitness. This quantity is named “inclusive fitness”. Species following the model should tend to evolve behaviour such that each organism appears to be attempting to maximize its inclusive fitness. This implies a limited restraint on selfish competitive behaviour and possibility of limited self-sacrifices.
Special cases of the model are used to show (a) that selection in the social situations newly covered tends to be slower than classical selection, (b) how in populations of rather non-dispersive organisms the model may apply to genes affecting dispersion, and (c) how it may apply approximately to competition between relatives, for example, within sibships. Some artificialities of the model are discussed. |
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0022-5193 |
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PMID:5875341 |
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Equine Behaviour @ team @ |
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5160 |
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Bjorklund, D.F.; Yunger, J.L.; Bering, J.M.; Ragan, P. |
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The generalization of deferred imitation in enculturated chimpanzees (Pan troglodytes) |
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Journal Article |
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2002 |
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Animal Cognition |
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Anim. Cogn. |
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5 |
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1 |
Pages |
49-58 |
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Age Factors; Animals; Behavior, Animal; Humans; *Imitative Behavior; Pan troglodytes/physiology/*psychology; Parenting; Species Specificity |
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Deferred imitation of object-related actions and generalization of imitation to similar but not identical tasks was assessed in three human-reared (enculturated) chimpanzees, ranging in age from 5 to 9 years. Each ape displayed high levels of deferred imitation and only slightly lower levels of generalization of imitation. The youngest two chimpanzees were more apt to generalize the model's actions when they had displayed portions of the target behaviors at baseline, consistent with the idea that learning is more likely to occur when working within the “zone of proximal development.” We argue that generalization of imitation is the best evidence to date of imitative learning in chimpanzees. |
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Department of Psychology, Florida Atlantic University, 777 Glades Road, Boca Raton, FL 33431-0991, USA. dbjorklund@fau.edu |
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1435-9448 |
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PMID:11957402 |
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Equine Behaviour @ team @ |
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2610 |
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Emery, N.J. |
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The eyes have it: the neuroethology, function and evolution of social gaze |
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Journal Article |
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2000 |
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Neuroscience and Biobehavioral Reviews |
Abbreviated Journal |
Neurosci Biobehav Rev |
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24 |
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6 |
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581-604 |
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Animals; *Eye; Fixation, Ocular; Humans; *Social Behavior |
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Gaze is an important component of social interaction. The function, evolution and neurobiology of gaze processing are therefore of interest to a number of researchers. This review discusses the evolutionary role of social gaze in vertebrates (focusing on primates), and a hypothesis that this role has changed substantially for primates compared to other animals. This change may have been driven by morphological changes to the face and eyes of primates, limitations in the facial anatomy of other vertebrates, changes in the ecology of the environment in which primates live, and a necessity to communicate information about the environment, emotional and mental states. The eyes represent different levels of signal value depending on the status, disposition and emotional state of the sender and receiver of such signals. There are regions in the monkey and human brain which contain neurons that respond selectively to faces, bodies and eye gaze. The ability to follow another individual's gaze direction is affected in individuals with autism and other psychopathological disorders, and after particular localized brain lesions. The hypothesis that gaze following is “hard-wired” in the brain, and may be localized within a circuit linking the superior temporal sulcus, amygdala and orbitofrontal cortex is discussed. |
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Center for Neuroscience, Department of Psychiatry & California Regional Primate Research Center, University of California, Davis, CA 95616, USA. njemery@ucdavis.edu |
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0149-7634 |
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PMID:10940436 |
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refbase @ user @ |
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3996 |
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