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Rizhova, L.Y.; Kokorina, E.P. |
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Title |
Behavioural asymmetry is involved in regulation of autonomic processes: Left side presentation of food improves reproduction and lactation in cows |
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Journal Article |
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Year |
2005 |
Publication |
Behavioural Brain Research |
Abbreviated Journal |
Behav. Brain. Res. |
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Volume |
161 |
Issue |
1 |
Pages |
75-81 |
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Keywords |
Behavioural asymmetry; Somatic functions; Reproduction; Lactation |
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Abstract |
It is known that the right and left brain hemispheres differ in their ability to regulate autonomic processes in the organism. Direct unilateral stimulation of the brain provokes side-dependent endocrine, immune and other visceral reactions. Since brain hemispheres are mainly involved in the regulation of muscles and sensory organs on the contra lateral side of the body the activation of behavioural asymmetry stimulates the contra lateral half of the brain. The important theoretical and practical question of whether autonomic processes can be regulated via the behavioural asymmetry route remains unexplored. In this study, we report that the chronic presentation of an emotionally important stimulus--food--from the left side, improves reproductive performance in animals in a broad range of feeding conditions. The unilateral presentation of food can also influence lactation, but in this case the side-dependent effects are different under varying feeding conditions. This finding opens a simple practical approach to influence basic somatic functions in the organism. |
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0166-4328 |
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Equine Behaviour @ team @ |
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5348 |
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Author |
Kilian, A.; Fersen, L. von; Güntürkün, O. |
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Title |
Left hemispheric advantage for numerical abilities in the bottlenose dolphin |
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Journal Article |
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Year |
2005 |
Publication |
Behavioural Processes |
Abbreviated Journal |
Behav. Process. |
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Volume |
68 |
Issue |
2 |
Pages |
179-184 |
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Keywords |
Bottlenose dolphin; Hemispheric specialization; Monocular vision; Numerical ability |
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In a two-choice discrimination paradigm, a bottlenose dolphin discriminated relational dimensions between visual numerosity stimuli under monocular viewing conditions. After prior binocular acquisition of the task, two monocular test series with different number stimuli were conducted. In accordance with recent studies on visual lateralization in the bottlenose dolphin, our results revealed an overall advantage of the right visual field. Due to the complete decussation of the optic nerve fibers, this suggests a specialization of the left hemisphere for analysing relational features between stimuli as required in tests for numerical abilities. These processes are typically right hemisphere-based in other mammals (including humans) and birds. The present data provide further evidence for a general right visual field advantage in bottlenose dolphins for visual information processing. It is thus assumed that dolphins possess a unique functional architecture of their cerebral asymmetries. |
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0376-6357 |
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Equine Behaviour @ team @ |
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5366 |
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Ventolini, N.; Ferrero, E.A.; Sponza, S.; Della Chiesa, A.; Zucca, P.; Vallortigara, G. |
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Title |
Laterality in the wild: preferential hemifield use during predatory and sexual behaviour in the black-winged stilt |
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Journal Article |
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Year |
2005 |
Publication |
Animal Behaviour |
Abbreviated Journal |
Anim. Behav. |
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69 |
Issue |
5 |
Pages |
1077-1084 |
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We recorded preferential use of the left and right monocular visual field in black-winged stilts, Himantopus himantopus, during predatory pecking and during courtship and mating behaviour in a naturalistic setting. The stilts had a population-level preference for using their right monocular visual field before predatory pecking; pecks that followed right-hemifield detection were more likely to be successful than pecks that followed left-hemifield detection, as evinced by the occurrence of swallowing and shaking head movements after pecking. In contrast, shaking behaviour, a component of courtship displays, and copulatory attempts by males were more likely to occur when females were seen with the left monocular visual field. Asymmetric hemifield use observed in natural conditions raises interesting issues as to the costs and benefits of population-level behavioural lateralization in wild animals. |
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0003-3472 |
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Equine Behaviour @ team @ |
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5589 |
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Author |
Güntürkün, O. |
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Title |
How asymmetry in animals starts |
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Year |
2005 |
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European Review |
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13 |
Issue |
2 |
Pages |
105-118 |
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This review aims to present a speculation about mechanisms that shape the brains of humans and other animals into an asymmetrical organization. To this end, I will proceed in two steps: first, I want to recapitulate evidence from various experiments that show that some but not all asymmetries of the avian brain result from a prehatch light stimulation asymmetry. This should make it clear that avian embryos have a genetic predisposition to turn their head to the right. This results in a higher level of prehatch light stimulation of their right eye. The concomitant left–right difference in sensory input alters the brain circuits of the animal for the entire lifespan in a lateralized way. In the second part of the paper I will present evidence that some of the asymmetries of the human brain take a similar ontogenetic path as those observed in birds. This review provides the evidence that critical ontogenetic processes discovered in animal models could also be involved in the ontogeny of human cerebral asymmetries. |
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Equine Behaviour @ team @ |
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5674 |
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Shen, Y.-Q.; Hebert, G.; Lin, L.-Y.; Luo, Y.-L.; Moze, E.; Li, K.-S.; Neveu, P.J. |
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Interleukine-1β and interleukine-6 levels in striatum and other brain structures after MPTP treatment: influence of behavioral lateralization |
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Journal Article |
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Year |
2005 |
Publication |
Journal of Neuroimmunology |
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Volume |
158 |
Issue |
1–2 |
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14-25 |
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N-methyl-4-phenyl-1,2,3,6-tetrahydropyridine; Dopamine; Brain; Interleukin-6; Interleukin-1β; Behavioral lateralization |
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MPTP (N-methyl-4-phenyl-1,2,3,6-tetrahydropyridine) induces diminution of the dopamine in nigrostriatal pathway and cognitive deficits in mice. MPTP treatment also increases pro-inflammatory cytokine production in substantia nigra and striatum. Since, pro-inflammatory cytokines influence striatal dopamine content and provoke cognitive impairments, the cognitive defects induced by MPTP may be partly due to brain cytokine induction in other structures than nigrostriatal pathway. Furthermore, behavioral lateralization, as assessed by paw preference, influences cytokine production at the periphery and in the central nervous system. Behavioral lateralization may thus influence brain cytokine levels after MPTP. In order to address these issues, mice selected for paw preference were injected with 25 mg/kg MPTP i.p. for five consecutive days after which striatal dopamine and DOPAC contents were measured by HPLC and IL-1β and IL-6 quantified by ELISA in the striatum, cerebral cortex, hippocampus and hypothalamus. The results showed that MPTP treatment induced dramatic loss of DA in striatum, simultaneously, IL-6 levels decreased in the striatum and increased in hippocampus and hypothalamus, while IL-1β levels decreased in the striatum, cerebral cortex and hippocampus. Interestingly, striatal dopamine turnover under basal conditions as well as striatal IL-1β and IL-6 levels under basal conditions and after MPTP depended on behavioral lateralization. Left pawed mice showed a higher decrease in dopamine turnover and lower cytokine levels as compared to right pawed animals. Behavioral lateralization also influenced IL-6 hippocampal levels under basal conditions and IL-1β cortical levels after MPTP. From these results, it can be concluded that MPTP-induced cognitive defects are accompanied by an alteration of pro-inflammatory cytokine levels in brain structures other than those involved in the nigrostriatal pathway. In addition, MPTP-induced dopamine decrease is influenced by behavioral lateralization, possibly through an effect on brain cytokine levels. |
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0165-5728 |
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Equine Behaviour @ team @ |
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5781 |
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Kruska, D.C.T. |
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On the evolutionary significance of encephalization in some eutherian mammals: effects of adaptive radiation, domestication, and feralization |
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2005 |
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Brain Behav Evol |
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65 |
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Equine Behaviour @ team @ Kruska2005 |
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6235 |
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Saunders, F.C.; McElligott, A.G.; Safi, K.; Hayden, T.J. |
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Mating tactics of male feral goats (Capra hircus): risks and benefits |
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2005 |
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Acta Ethol |
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8 |
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Equine Behaviour @ team @ Saunders2005 |
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6252 |
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Shi, J.; Dunbar, R.I.M.; Buckland, D.; Miller, D. |
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Dynamics of grouping patterns and social segregation in feral goats (Capra hircus) on the Isle of Rum, NW Scotland |
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2005 |
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Mammalia |
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69 |
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Equine Behaviour @ team @ Shi2005 |
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6257 |
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Author |
Pérez-Barbería, F.J.; Gordon, I.J. |
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Title |
Gregariousness increases brain size in ungulates |
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2005 |
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Oecologia |
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145 |
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Equine Behaviour @ team @ Pérez-Barbería2005 |
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6258 |
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Author |
Galef, B.G.; Laland, K.N. |
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Title |
Social Learning in Animals: Empirical Studies and Theoretical Models |
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2005 |
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BioScience |
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55 |
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6 |
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489-499 |
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AbstractThe last two decades have seen a virtual explosion in empirical research on the role of social interactions in the development of animals' behavioral repertoires, and a similar increase in attention to formal models of social learning. Here we first review recent empirical evidence of social influences on food choice, tool use, patterns of movement, predator avoidance, mate choice, and courtship, and then consider formal models of when animals choose to copy behavior, and which other animals' behavior they copy, together with empirical tests of predictions from those models. |
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0006-3568 |
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10.1641/0006-3568(2005)055[0489:Sliaes]2.0.Co;2 |
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Equine Behaviour @ team @ |
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6398 |
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