Deficits in Landmark Navigation and Path Integration After Lesions of the Interpeduncular Nucleus.
Experiments were designed to determine the role of the interpeduncular nucleus (IPN) in 3 forms of navigation: beacon, landmark, and path integration. In beacon navigation, animals reach goals using cues directly associated with them, whereas in landmark navigation animals use external cues to deter...
| Publicado en: | Behavioral Neuroscience Vol. 123; no. 3; pp. 490 - 504 |
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| Autores principales: | , |
| Formato: | Artículo |
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American Psychological Association
June 2009
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ssf&AN=506892394&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 506892394 longDbName: Social Sciences Full Text (H.W. Wilson) uiTag: AN controlInfo: bkinfo: jinfo: jid: 07357044 BEN jtl: Behavioral Neuroscience issn: 07357044 maglogo: N pubinfo: dt: June 2009 vid: 123 iid: 3 pid: 34 pub: American Psychological Association artinfo: ui: 506892394 10.1037/a0015477 ppf: 490 ppct: 14 formats: tig: atl: Deficits in Landmark Navigation and Path Integration After Lesions of the Interpeduncular Nucleus. aug: au: Clark, Benjamin J. Taube, Jeffrey S. su: Mesencephalon Brain function localization Animal navigation Laboratory rats sug: subj: Mesencephalon Brain function localization Animal navigation Laboratory rats ab: Experiments were designed to determine the role of the interpeduncular nucleus (IPN) in 3 forms of navigation: beacon, landmark, and path integration. In beacon navigation, animals reach goals using cues directly associated with them, whereas in landmark navigation animals use external cues to determine a direction and distance to goals. Path integration refers to the use of self-movement cues to obtain a trajectory to a goal. IPN-lesioned rats were tested in a food-carrying task in which they searched for food in an open field, and returned to a refuge after finding the food. Landmark navigation was evaluated during trials performed under lighted conditions and path integration was tested under darkened conditions, thus eliminating external cues. We report that IPN lesions increased the number of errors and reduced heading accuracy under both lighted and darkened conditions. Tests using a Morris water maze procedure indicated that IPN lesions produced moderate impairments in the landmark version of the water task, but left beacon navigation intact. These findings suggest that the IPN plays a fundamental role in landmark navigation and path integration. Reprinted by permission of the publisher. pubtype: Academic Journal doctype: Article src: R language: English refInfo: copyright: @attributes: flag: N holdings: @attributes: islocal: N |
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