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

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 stra...

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Autores principales:	ESPINA-MARCHANT,PABLO, PINTO-HAMUY,TERESA, BUSTAMANTE,DIEGO, MORALES,PAOLA, ROBLES,LUIS, HERRERA-MARSCHITZ,MARIO
Lenguaje:	English
Publicado:	Sociedad de Biología de Chile 2006
Materias:	Anteromedial/posterior parietal cortex hippocampus lidocaine, long-term memory working memory intracerebral infusion rat
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000500003
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spelling	oai:scielo:S0716-976020060005000032007-08-06Spatial 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 tasksESPINA-MARCHANT,PABLOPINTO-HAMUY,TERESABUSTAMANTE,DIEGOMORALES,PAOLAROBLES,LUISHERRERA-MARSCHITZ,MARIO Anteromedial/posterior parietal cortex hippocampus lidocaine, long-term memory working memory intracerebral infusion rat 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 working and long-term memory errors after a delay. Then, the animals were infused with lidocaine or saline during the delay phase and tested for three days. Another series of animals, treated as before, was tested in an Olton Octagonal Maze and subjected to the same injection schedule. In the Olton 4x4 Maze, lidocaine produced a significant increase in working and long-term memory errors, compared to saline and post-lidocaine conditions. In contrast, in the Olton Octagonal Maze, lidocaine did not induce any effect on working memory errors. Thus, AM/PPC is required when both working with previous information and long-term memories are needed, but not when only working memory is required, as it happens under ethological conditions. Whenever food supply is dispersed, a win-shift strategy is preferableinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileBiological Research v.39 n.4 20062006-01-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000500003en10.4067/S0716-97602006000500003
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Anteromedial/posterior parietal cortex hippocampus lidocaine, long-term memory working memory intracerebral infusion rat
spellingShingle	Anteromedial/posterior parietal cortex hippocampus lidocaine, long-term memory working memory intracerebral infusion rat ESPINA-MARCHANT,PABLO PINTO-HAMUY,TERESA BUSTAMANTE,DIEGO MORALES,PAOLA ROBLES,LUIS HERRERA-MARSCHITZ,MARIO 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
description	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 working and long-term memory errors after a delay. Then, the animals were infused with lidocaine or saline during the delay phase and tested for three days. Another series of animals, treated as before, was tested in an Olton Octagonal Maze and subjected to the same injection schedule. In the Olton 4x4 Maze, lidocaine produced a significant increase in working and long-term memory errors, compared to saline and post-lidocaine conditions. In contrast, in the Olton Octagonal Maze, lidocaine did not induce any effect on working memory errors. Thus, AM/PPC is required when both working with previous information and long-term memories are needed, but not when only working memory is required, as it happens under ethological conditions. Whenever food supply is dispersed, a win-shift strategy is preferable
author	ESPINA-MARCHANT,PABLO PINTO-HAMUY,TERESA BUSTAMANTE,DIEGO MORALES,PAOLA ROBLES,LUIS HERRERA-MARSCHITZ,MARIO
author_facet	ESPINA-MARCHANT,PABLO PINTO-HAMUY,TERESA BUSTAMANTE,DIEGO MORALES,PAOLA ROBLES,LUIS HERRERA-MARSCHITZ,MARIO
author_sort	ESPINA-MARCHANT,PABLO
title	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
title_short	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
title_full	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
title_fullStr	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
title_full_unstemmed	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
title_sort	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
publisher	Sociedad de Biología de Chile
publishDate	2006
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602006000500003
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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

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