Consulta: creatorFacets:"ROBLES,LUIS"
Registros recuperados: 3
Data/hora: 07/06/2024 08:30:24

Spatial cognition and memory: a reversible lesion with lidocaine into the anteromedial/posterior parietal cortex (AM/PPC) affects differently working and long-term memory on two foraging tasks
Provedor de dados: 48
Autores: ESPINA-MARCHANT,PABLO; PINTO-HAMUY,TERESA; BUSTAMANTE,DIEGO; MORALES,PAOLA; ROBLES,LUIS; HERRERA-MARSCHITZ,MARIO.
Place memory is relevant for exploration and forage behaviour. When food supply is dispersed, a win-shift has advantage over a win-stay strategy. In the Olton Octagonal Maze, the rat follows a win-shift strategy using working memory. However, in the Olton 4x4 version, the rat follows a win-stay strategy, using both working and long-term memories. It has been suggested that the neocortex is required for the resolution of tasks demanding long-term, but not for that demanding working memory alone. The role of anteromedial/posterior parietal cortex (AM/PPC) was investigated here, using a reversible lesion induced by intracerebral lidocaine infusion. Long-Evans rats were implanted with guide cannulae into the AM/PPC and trained in an Olton 4x4 maze, counting...
Tipo: Journal article
Palavras-chave: Anteromedial/posterior parietal cortex hippocampus lidocaine; Long-term memory working memory intracerebral infusion rat.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000500003

A neutral cue facilitates detection of a visual target by modulating attention
Provedor de dados: 48
Autores: HAMAME,CARLOS M; DELANO,PAÚL H; ROBLES,LUIS.
Twelve rats were trained to perform a two-choice visual detection task in which a right or left light was presented and the animáis were required to press the lever located under the illuminated light for a food reward. In seventy percent of the triáis the target light was preceded by presentation of a neutral cue (a central light). Relevance of the neutral cue for detection of the target was analyzed by comparing behavioral Índices of attention in its presence and absence. Accuracy was significantly higher in presence than in absence of the neutral cue, while mean response latencies were lower in presence than in absence of the neutral cue. These results indicate that the animáis allocated attentional resources on the target detection during a high...
Tipo: Journal article
Palavras-chave: Alerting effect; Attention; Detection task; Expectancy; Neutral cue; Rat.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000400012

Relevance of a neutral cue in a two-choice detection task in the rat
Provedor de dados: 48
Autores: HAMAME,CARLOS M; DELANO,PAUL H; ROBLES,LUIS.
Relevance of a neutral cue for performance in a two-choice visuospatial detection task was examined. Nine rats were trained, 5 with short intertrial interval (ITI) and 4 with long ITI, to detect a target (lateral lights) presented after a neutral-cue (central light). The removal of the neutral-cue decreased accuracy and increased response latencies and omissions. These results demonstrate that a neutral-cue, preceding the target, is relevant for the performance, suggesting that rats are highly expectant during the neutral-cue and reallocate attentional resources during ITI. Furthermore, latencies were higher, omissions were lower and the fall of accuracy was greater for rats with long than with short ITI, which could indicate that the neutral-cue was more...
Tipo: Journal article
Palavras-chave: Attention; Expectancy; Neutral cue; Attentional task; Rat.
Ano: 2006
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000200008