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Titolo:
Place and response learning of rats in a Morris water maze: Differential effects of fimbria fornix and medial prefrontal cortex lesions
Autore:
de Bruin, JPC; Moita, MP; de Brabander, HM; Joosten, RNJMA;
Indirizzi:
Netherlands Inst Brain Res, Grad Sch Neurosci Amsterdam, NL-1105 AZ Amsterdam, Netherlands Netherlands Inst Brain Res Amsterdam Netherlands NL-1105AZ Netherlands
Titolo Testata:
NEUROBIOLOGY OF LEARNING AND MEMORY
fascicolo: 2, volume: 75, anno: 2001,
pagine: 164 - 178
SICI:
1074-7427(200103)75:2<164:PARLOR>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
SPATIAL COGNITIVE MAPS; POSTERIOR PARIETAL; HIPPOCAMPAL-FORMATION; DOUBLE DISSOCIATION; CAUDATE-NUCLEUS; SWIMMING POOL; MEMORY; NAVIGATION; DEFICITS; LOCALIZATION;
Keywords:
prefrontal cortex; fimbria fornix; place learning; response learning; Morris water maze; rat;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: de Bruin, JPC Netherlands Inst Brain Res, Grad Sch Neurosci Amsterdam, Meibergdreef 33, NL-1105 AZ Amsterdam, Netherlands Netherlands Inst Brain Res Meibergdreef 33 Amsterdam Netherlands NL-1105 AZ
Citazione:
J.P.C. de Bruin et al., "Place and response learning of rats in a Morris water maze: Differential effects of fimbria fornix and medial prefrontal cortex lesions", NEUROBIOL L, 75(2), 2001, pp. 164-178

Abstract

The question examined in this study is concerned with a possible functional dissociation between the hippocampal formation and the prefrontal cortex in spatial navigation. Wistar rats with hippocampal damage (inflicted by a bilateral lesion of the fimbria fornix), rats with damage to the medial prefrontal cortex, and control-operated rats were examined for their performance in either one of two different spatial tasks in a Morris water maze, a place learning task (requiring a locale system), or a response learning task(requiring a taxon system). Performance of the classical place learning (allocentric) task was found to be impaired in rats with lesions of the fimbria fornix, but hot in rats with damage of the medial prefrontal cortex. while the opposite effect was found in the response learning (egocentric) task. These findings are indicative of a double functional dissociation of these two brain regions with respect to the two different forms of spatial navigation. When the place learning task was modified by relocating the platform, the impairment in animals with fimbria fornix lesions was even more pronounced than before, while the performance of animals with medial prefrontalcortex lesions was similar to that of their controls. When the task was again modified by changing the hidden platform for a clearly visible one (visual cue task), the animals with fimbria fornix lesions had, at least initially, shorter latencies than their controls. By contrast, in the animals with medial prefrontal cortex damage this change led to a slight increase in escape latency. (C) 2001 Academic Press.

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Documento generato il 28/03/20 alle ore 22:59:34