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• W2106138734 abstract "The hippocampus plays an essential role in spatial learning. To investigate whether the whole structure is equally important, we compared the effects of variously sized and localized hippocampal aspiration lesions on spatial learning in a Morris water maze. The volume of all hippocampal lesions was determined. Dorsal hippocampal lesions consistently impaired spatial learning more than equally large ventral lesions. The dorsal lesions had to be larger than 20% of the total hippocampal volume to prolong final escape latencies. The acquisition rate and precision on a probe test without platform were sensitive to even smaller dorsal lesions. The degree of impairment correlated with the lesion volume. In contrast, the lesions of the ventral half of the hippocampus spared both the rate and the precision of learning unless nearly all of the ventral half was removed. There was no significant effect of the location (dorsal or ventral) of damage to the overlying neocortex only. In conclusion, the dorsal half of the hippocampus appears more important for spatial learning than the ventral half. The spatial learning ability seems related to the amount of damaged dorsal hippocampal tissue, with a threshold at about 20% of the total hippocampal volume, under which normal learning can occur." @default.
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• W2106138734 date "1993-09-01" @default.
• W2106138734 modified "2023-10-17" @default.
• W2106138734 title "Spatial learning impairment parallels the magnitude of dorsal hippocampal lesions, but is hardly present following ventral lesions" @default.
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• W2106138734 doi "https://doi.org/10.1523/jneurosci.13-09-03916.1993" @default.
• W2106138734 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6576447" @default.
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• W2106138734 hasPublicationYear "1993" @default.
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