Insular Cortex and Consummatory Successive Negative Contrast in the Rat.
Rats that are expecting a high value reward (e.g., 1.0 M sucrose) show an exaggerated underresponding when they are instead given a low value reward (e.g., 0.15% saccharin), an effect termed successive negative contrast (SNC). In the present experiment, insular cortex-lesioned (ICX) rats showed norm...
| Publicado en: | Behavioral Neuroscience Vol. 123; no. 4; pp. 810 - 815 |
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| Autores principales: | , , |
| Formato: | Artículo |
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American Psychological Association
August 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=506913907&site=ehost-live header: @attributes: shortDbName: ssf uiTerm: 506913907 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: August 2009 vid: 123 iid: 4 pid: 34 pub: American Psychological Association artinfo: ui: 506913907 10.1037/a0016460 ppf: 810 ppct: 5 formats: tig: atl: Insular Cortex and Consummatory Successive Negative Contrast in the Rat. aug: au: Lin, Jian-You Roman, Christopher Reilly, Steve su: Cerebral cortex Laboratory rats Taste Brain function localization sug: subj: Cerebral cortex Laboratory rats Taste Brain function localization ab: Rats that are expecting a high value reward (e.g., 1.0 M sucrose) show an exaggerated underresponding when they are instead given a low value reward (e.g., 0.15% saccharin), an effect termed successive negative contrast (SNC). In the present experiment, insular cortex-lesioned (ICX) rats showed normal responsivity to sucrose and saccharin prior to the reward downshift. However, when switched from sucrose to saccharin during the postshift trials these rats displayed no evidence of SNC. Indeed, over the downshift trials these ICX rats consistently drank more saccharin than the ICX rats maintained on saccharin throughout the experiment. Potential interpretations are discussed including a lesion-induced impairment in the ability to accurately recognize the novelty of the postshift saccharin stimulus. 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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