Artículo
Administration of corticosterone after the first downshift trial enhances consummatory successive negative contrast
Bentosela, Mariana
; Muzio, Ruben Nestor
; Ruetti, Eliana Martha
; Mustaca, Alba Elisabeth
; Papini, Mauricio Roberto
Fecha de publicación:
2006
Editorial:
American Psychological Association
Revista:
Behavioral Neuroscience.
ISSN:
0735-7044
e-ISSN:
1939-0084
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Rats given access to a 32% sucrose solution and then downshifted to a 4% solution exhibit less contact with the sipper tube than unshifted controls always given access to 4% solution. This phenomenon, called consummatory successive negative contrast, was facilitated in Experiment 1 by a post-trial injection of corticosterone (3 mg/kg) administered immediately after the first downshift trial. Experiment 2 demonstrated that this facilitatory effect of post-trial corticosterone does not occur when administered 3 hr after the first downshift trial. These results support the hypothesis that corticosterone strengthens an aversive emotional component elicited by the surprising downshift in reward magnitude during the initial downshift trial.
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Articulos(IBYME)
Articulos de INST.DE BIOLOGIA Y MEDICINA EXPERIMENTAL (I)
Articulos de INST.DE BIOLOGIA Y MEDICINA EXPERIMENTAL (I)
Articulos(IDIM)
Articulos de INST.DE INVEST.MEDICAS
Articulos de INST.DE INVEST.MEDICAS
Citación
Bentosela, Mariana; Muzio, Ruben Nestor; Ruetti, Eliana Martha; Mustaca, Alba Elisabeth; Papini, Mauricio Roberto; Administration of corticosterone after the first downshift trial enhances consummatory successive negative contrast; American Psychological Association; Behavioral Neuroscience.; 120; 2; -1-2006; 371-376
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