Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/9684
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dc.contributor.authorRogers, Lesleyen
local.source.editorEditor(s): Gordon A Barren
dc.date.accessioned2012-03-13T14:59:00Z-
dc.date.issued2005-
dc.identifier.citationDevelopmental Psychobiology, 47(4), p. 446-446en
dc.identifier.issn1098-2302en
dc.identifier.issn0012-1630en
dc.identifier.urihttps://hdl.handle.net/1959.11/9684-
dc.description.abstractLateralization is widespread among vertebrates and the domestic chicken provides an excellent model to investigate the processes involved in its development. Exposure to light just prior to hatching triggers developmental processes that lead to lateralization of the visual pathways and to a range of visual behaviors after hatching. This outcome depends on the orientation of the embryo in the egg (occlusion of the left, and not the right, eye). Chicks hatched from eggs incubated in the dark do not develop visual lateralization. Steroid hormone levels pre-hatching interact with the effect of light (e.g., elevated levels of corticosterone prevent lateralization from developing). These pre-hatching events, occurring during a brief sensitive period, channel development of phenotypes that are likely to enhance survival in different environments. Visually lateralized chicks are able to perform more than one task simultaneously (forage and monitor for predators) with ease, whereas non-lateralized chicks have difficulty in dividing their attention effectively. In a natural context, development of lateralization would be triggered by a series of events beginning with the amount of stress hormone that the hen deposits in her eggs, this itself depending on her social position and other stressors in the environment. Then, just prior to hatching, the embryo's endogenous levels of corticosterone, triggered by stress (e.g., becoming cold), would take effect as too would light exposure, determined by the hen vacating the nest (2 hr is sufficient). Hence, a series of events channel brain development toward lateralization (low stress plus light) or non-lateralization (stress and no light). [Australian Research Council.]en
dc.languageenen
dc.publisherJohn Wiley & Sons, Incen
dc.relation.ispartofDevelopmental Psychobiologyen
dc.titleSensitive periods, environmental triggers, and development of a lateralized brainen
dc.typeConference Publicationen
dc.relation.conferenceISDP 2005: 38th Annual Meeting of the International Society for Developmental Psychobiologyen
dc.identifier.doi10.1002/dev.20113en
dc.subject.keywordsAnimal Neurobiologyen
local.contributor.firstnameLesleyen
local.subject.for2008060805 Animal Neurobiologyen
local.subject.seo2008970106 Expanding Knowledge in the Biological Sciencesen
local.profile.schoolSchool of Science and Technologyen
local.profile.emaillrogers@une.edu.auen
local.output.categoryE3en
local.record.placeauen
local.record.institutionUniversity of New Englanden
local.identifier.epublicationsrecordpes:2360en
local.date.conference9th - 12th November, 2005en
local.conference.placeWashington, United States of Americaen
local.publisher.placeUnited States of Americaen
local.identifier.runningnumberAbstract 122en
local.format.startpage446en
local.format.endpage446en
local.identifier.volume47en
local.identifier.issue4en
local.contributor.lastnameRogersen
dc.identifier.staffune-id:lrogersen
local.profile.roleauthoren
local.identifier.unepublicationidune:9875en
dc.identifier.academiclevelAcademicen
local.title.maintitleSensitive periods, environmental triggers, and development of a lateralized brainen
local.output.categorydescriptionE3 Extract of Scholarly Conference Publicationen
local.conference.detailsISDP 2005: 38th Annual Meeting of the International Society for Developmental Psychobiology, Washington, United States of America, 9th - 12th November, 2005en
local.search.authorRogers, Lesleyen
local.uneassociationUnknownen
local.year.published2005en
local.date.start2005-11-09-
local.date.end2005-11-12-
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School of Science and Technology
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