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• W2074561898 abstract "Rats were assigned to one of the following treatments: bilateral cut of basal forebrain-cortical fibers (DEAFF), ibotenic (IBO) or quisqualic (QUIS) acid lesions of the NBM and sham operations (SHAM). They were trained to perform a radial eight-arm maze task with all the paths or only four paths baited. Cortical cholinergic release measured by microdialysis in vivo and choline acetyltransferase activity were also assessed in the four lesion conditions. The results show that, in the full baited maze task, only the DEAFF group showed a severe spatial learning impairment. In the four-baited path task, the DEAFF group was still more impaired than the other groups but a performance deficit also emerged in rats with IBO lesions. Neurochemical data indicated that cortical choline acetyltransferase activity was reduced by 25% after IBO lesions, by 52% after DEAFF and by 46% after Quis lesions. However, cortical cholinergic release, which dropped in the same fashion after DEAFF or QUIS lesions, was unaffected by IBO lesions. Thus, in spite of the distinctive patterns of behaviour exhibited by the three lesioned groups, no correlation between cortical cholinergic deficiencies and spatial learning impairment was found. The similar behavioural effects produced by DEAFF and fornix sections suggests that, among the basal forebrain-cortical pathways, descending fibers projecting onto the septo-hippocampal system could exert a strong control on spatial learning performance." @default.
• W2074561898 created "2016-06-24" @default.
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• W2074561898 date "1993-04-01" @default.
• W2074561898 modified "2023-09-23" @default.
• W2074561898 title "Mechanical deafferentation of basal forebrain-cortical pathways and neurotoxic lesions of the nucleus basalis magnocellularis: comparative effect on spatial learning and cortical acetylcholine release in vivo" @default.
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• W2074561898 doi "https://doi.org/10.1016/0166-4328(93)90073-y" @default.
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