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Author  |
Rogers, L.J. |
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Title |
Advantages and disadvantages of lateralization |
Type |
Book Chapter |
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Year |
2002 |
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Abbreviated Journal |
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Pages |
126-153 |
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Publisher |
Cambridge University Press |
Place of Publication |
New York |
Editor |
L. J. Rogers,; R. Andrew, |
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9780521781619 |
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Call Number |
Equine Behaviour @ team @ L.J.Rogers+R.Andrew(eds)2002 |
Serial |
4624 |
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Author |
Rogers, L.J. |
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Title |
Evolution of Side Biases: Motor versus Sensory Lateralization |
Type |
Book Chapter |
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Year |
2002 |
Publication |
Side Bias: A Neuropsychological Perspective |
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Pages |
3-40-40 |
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Keywords |
Medicine & Public Health |
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Springer Netherlands |
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Editor |
Mandal, M.K.; Bulman-Fleming, M.B.; Tiwari, G. |
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978-0-306-46884-1 |
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Call Number |
Equine Behaviour @ team @ |
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5357 |
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Author |
Rogers, L.J. |
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Title |
Evolution of hemispheric specialization: advantages and disadvantages |
Type |
Journal Article |
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Year |
2000 |
Publication |
Brain and Language |
Abbreviated Journal |
Brain Lang |
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Volume |
73 |
Issue |
2 |
Pages |
236-253 |
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Keywords |
Aggression/psychology; Animals; Behavior, Animal/physiology; Brain/*physiology; Chickens/physiology; *Evolution; Feeding Behavior/physiology; Functional Laterality/*physiology; Visual Fields/physiology; Visual Perception/physiology |
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Abstract |
Lateralization of the brain appeared early in evolution and many of its features appear to have been retained, possibly even in humans. We now have a considerable amount of information on the different forms of lateralization in a number of species, and the commonalities of these are discussed, but there has been relatively little investigation of the advantages of being lateralized. This article reports new findings on the differences between lateralized and nonlateralized chicks. The lateralized chicks were exposed to light for 24 h on day 19 of incubation, a treatment known to lead to lateralization of a number of visually guided responses, and the nonlateralized chicks were incubated in the dark. When they were feeding, the lateralized chicks were found to detect a stimulus resembling a raptor with shorter latency than nonlateralized chicks. This difference was not a nonspecific effect caused by the light-exposed chicks being more distressed by the stimulus. Instead, it appears to be a genuine advantage conferred by having a lateralized brain. It is suggested that having a lateralized brain allows dual attention to the tasks of feeding (right eye and left hemisphere) and vigilance for predators (left eye and right hemisphere). Nonlateralized chicks appear to perform these dual tasks less efficiently than lateralized ones. Reference is made to other species in discussing these results. |
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Address |
Division of Zoology, University of New England, Armidale, New South Wales, Australia. lrogers@metz.une.edu.au |
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English |
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0093-934X |
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Notes |
PMID:10856176 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4621 |
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Author |
Rogers, L.J. |
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Title |
Early Experiential Effects on Laterality: Research on Chicks has Relevance to Other Species |
Type |
Journal Article |
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Year |
1997 |
Publication |
Laterality |
Abbreviated Journal |
Laterality |
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Volume |
2 |
Issue |
3-4 |
Pages |
199-219 |
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Abstract |
The influence of early experience on the development of lateralisation of hemispheric function was further investigated, using the chick as a model. A range of functions are lateralised in the chick and these correlate with asymmetry in the organisation of the visual projections. Chicks using the right eye and, therefore, primarily the left hemisphere are able to switch from pecking randomly at grain and pebbles to pecking mainly at grain, whereas those using the left eye and primarily the right hemisphere continue to peck at random. Exposure to light during the last days of incubation establishes this lateralisation in males, as a consequence of the embryo being oriented in the egg so that the left eye only is occluded. Males incubated in the dark peck at random when using either the right or left eye. Irrespective of light experience, females perform the same as darkincubated males: they are not influenced by light exposure. Monocular performance of the pebble-grain task is compared to binocular performance, and the sensitive period for the influence of light is delineated. The interactive effects of sex hormone levels on the differentiation of lateralisation are discussed and also the relevance of the results to other species, including humans. |
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Publisher |
Psychology Press |
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ISSN |
1357-650x |
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Notes |
doi: 10.1080/713754277 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
5587 |
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Author |
Siniscalchi, M.; McFarlane, J.R.; Kauter, K.G.; Quaranta, A.; Rogers, L.J. |
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Title |
Cortisol levels in hair reflect behavioural reactivity of dogs to acoustic stimuli |
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Journal Article |
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Year |
2013 |
Publication |
Research in Veterinary Science |
Abbreviated Journal |
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Volume |
94 |
Issue |
1 |
Pages |
49-54 |
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Keywords |
Dogs; Behaviour; Cortisol; Hair; Acoustic stimuli |
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Abstract |
Cortisol levels in hair samples were examined in fourteen domestic dogs and related to the dogs’ responses to different acoustic stimuli. Stimuli were playbacks of species-typical vocalizations recorded during three different situations (“disturbance”, “isolation” and “play” barks) and the sounds of a thunderstorm. Hair samples were collected at 9:00 h and 17:00 h two weeks after the behavioural tests. Results showed that behavioural reactivity to playback of the various stimuli correlates with cortisol levels in hair samples collected at 9:00 h, and the same was the case for the separate measures of behaviour (i.e. hiding, running away, seeking attention from the tester, panting and lowering of the body posture). Hence, levels of cortisol in hair appear to reflect the dog’s chronic state of emotional reactivity, or temperament. |
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ISSN |
0034-5288 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
5833 |
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Author |
Siniscalchi, M.; Quaranta, A.; Rogers, L.J. |
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Title |
Hemispheric specialization in dogs for processing different acoustic stimuli |
Type |
Journal Article |
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Year |
2008 |
Publication |
PloS ONE |
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3 |
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Pages |
e3349 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
5415 |
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Author |
Vallortigara, G.; Rogers, L.J. |
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Title |
Survival with an asymmetrical brain: advantages and disadvantages of cerebral lateralization |
Type |
Journal Article |
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Year |
2005 |
Publication |
The Behavioral and Brain Sciences |
Abbreviated Journal |
Behav Brain Sci |
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Volume |
28 |
Issue |
4 |
Pages |
575-89; discussion 589-633 |
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Keywords |
Animals; Attention/*physiology; Behavior/*physiology; Behavior, Animal/*physiology; Dominance, Cerebral/*physiology; *Evolution; Humans; Models, Biological; Visual Perception/physiology |
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Abstract |
Recent evidence in natural and semi-natural settings has revealed a variety of left-right perceptual asymmetries among vertebrates. These include preferential use of the left or right visual hemifield during activities such as searching for food, agonistic responses, or escape from predators in animals as different as fish, amphibians, reptiles, birds, and mammals. There are obvious disadvantages in showing such directional asymmetries because relevant stimuli may be located to the animal's left or right at random; there is no a priori association between the meaning of a stimulus (e.g., its being a predator or a food item) and its being located to the animal's left or right. Moreover, other organisms (e.g., predators) could exploit the predictability of behavior that arises from population-level lateral biases. It might be argued that lateralization of function enhances cognitive capacity and efficiency of the brain, thus counteracting the ecological disadvantages of lateral biases in behavior. However, such an increase in brain efficiency could be obtained by each individual being lateralized without any need to align the direction of the asymmetry in the majority of the individuals of the population. Here we argue that the alignment of the direction of behavioral asymmetries at the population level arises as an “evolutionarily stable strategy” under “social” pressures occurring when individually asymmetrical organisms must coordinate their behavior with the behavior of other asymmetrical organisms of the same or different species. |
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Address |
Department of Psychology and B.R.A.I.N. Centre for Neuroscience, University of Trieste, 34123 Trieste, Italy. vallorti@univ.trieste.it |
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0140-525X |
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Notes |
PMID:16209828 |
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Call Number |
Equine Behaviour @ team @ |
Serial |
4622 |
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