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Titolo:
Neurotoxic hippocampal lesions have no effect on odor span and little effect on odor recognition memory but produce significant impairments on spatial span, recognition, and alternation
Autore:
Dudchenko, PA; Wood, ER; Eichenbaum, H;
Indirizzi:
Univ Stirling, Dept Psychol, Stirling FK9 4LA, Scotland Univ Stirling Stirling Scotland FK9 4LA chol, Stirling FK9 4LA, Scotland Univ Edinburgh, Dept Neurosci, Edinburgh EH8 9JZ, Midlothian, Scotland Univ Edinburgh Edinburgh Midlothian Scotland EH8 9JZ Midlothian, Scotland Boston Univ, Lab Cognit Neurobiol, Boston, MA 02215 USA Boston Univ Boston MA USA 02215 ab Cognit Neurobiol, Boston, MA 02215 USA
Titolo Testata:
JOURNAL OF NEUROSCIENCE
fascicolo: 8, volume: 20, anno: 2000,
pagine: 2964 - 2977
SICI:
0270-6474(20000415)20:8<2964:NHLHNE>2.0.ZU;2-7
Fonte:
ISI
Lingua:
ENG
Soggetto:
WORKING-MEMORY; OBJECT RECOGNITION; PERIRHINAL CORTEX; LONG LISTS; TO-SAMPLE; RATS; MONKEYS; FORNIX; COMPONENTS; CORTICES;
Keywords:
hippocampus; ibotenic acid; delayed nonmatching to sample; span; olfactory memory; spatial memory; delayed alternation; T-maze;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Dudchenko, PA Univ Stirling, Dept Psychol, Stirling FK9 4LA, Scotland UnivStirling Stirling Scotland FK9 4LA FK9 4LA, Scotland
Citazione:
P.A. Dudchenko et al., "Neurotoxic hippocampal lesions have no effect on odor span and little effect on odor recognition memory but produce significant impairments on spatial span, recognition, and alternation", J NEUROSC, 20(8), 2000, pp. 2964-2977

Abstract

Recent work has shown that lesions of the hippocampus in monkeys cause deficits in the capacity to remember increasing numbers of objects, colors, and spatial locations (Beason-Held et al., 1999). However, others have observed that hippocampectomized monkeys can show intact memory for a list of objects or locations (Murray and Mishkin, 1998). We wished to explore the effects of hippocampal damage on the capacity of memory in the rodent and, to do so, developed novel "span" tasks in which a variable number of odors or locations had to be remembered. In the odor span task (experiment 1), rats were trained on a nonmatching to sample task in which increasing numbers of odors had to be remembered. Half of the trained rats received ibotenic acidlesions of the hippocampus. Postoperatively, hippocampectomized animals did not differ from control animals even when required to remember up to 24 odors. However, when tested on delayed retention of a list of 12 odors, ratswith hippocampal lesions were impaired at a long delay. Also, these rats were impaired on a subsequent test of delayed spatial alternation. In a spatial span task (experiment 2), naive rats were trained on a nonmatching to sample task in which a variable number of locations had to be remembered. After this, half of the animals received ibotenic acid lesions. Postoperatively, hippocampectomized animals performed above chance levels when required to remember a single cup location, but were unable to remember more. Subsequent testing on another spatial delayed alternation task suggested that hippocampectomized rats could recognize, but could not inhibit their approach to previously visited locations.

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Documento generato il 30/03/20 alle ore 18:47:44