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Spatial Memory in Long Evans and Rattus Norvegicus rats Biol. Res.
BUSTOS M,GLORIA; BASOALTO B,EVELYN; PINTO-HAMUY,TERESA.
Rodents in search of food use visual environmental signals and complex spatial strategies and do not return to previously-visited locations, known as the win-shift strategy. The solution to the Olton Octagonal Maze (OOM) involves Working Memory (WM). A modified OOM was used that allows for measuring WM and Long Term Memory (LTM). The delayed spatial win-shift task consisted of a Training and Test phase separated by a delay. Prior to the Training phase, four arms were chosen at random and blocked, and food pellets were placed in the food cups of the four remaining open arms. Each rat was allowed to retrieve the pellets from the four open arms and then return to its home cage for the delay period (either 5 or 20 min). In the Test phase all 8 lanes were open,...
Tipo: Journal article Palavras-chave: Long Term Memory; Working Memory; Olton 4X4; Long Evans Rats; Rattus Norvegicus Rats.
Ano: 2003 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602003000200009
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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 Biol. Res.
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
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