Abstract:
:In this study, we evaluated the effects of NMDA-induced lesions in different sites of the insular cortex of the rat on the acquisition of conditioned taste aversion and spatial learning in the Morris water maze. The lesions were produced by bilateral microinjections of NMDA in the insular cortex at +3.7 mm (Anterior group), +1.7 mm (Central group), and -0.3 mm (Posterior group) anteroposterior from bregma. The results showed that the central and posterior, but not the anterior, lesions disrupted the acquisition of water maze learning as measured by the high latency to reach the target. In contrast, the conditioned taste aversion learning was disrupted by lesions in the central but not in the anterior or posterior insular cortex. These data confirm functional heterogeneity of the insular cortex and demonstrate that the more caudal parts are only necessary for acquisition of the water maze task, while the central insular cortex is crucial for the acquisition of both the conditioned taste aversion learning and the Morris water maze.
journal_name
Neurobiol Learn Memjournal_title
Neurobiology of learning and memoryauthors
Nerad L,Ramírez-Amaya V,Ormsby CE,Bermúdez-Rattoni Fdoi
10.1006/nlme.1996.0042subject
Has Abstractpub_date
1996-07-01 00:00:00pages
44-50issue
1eissn
1074-7427issn
1095-9564pii
S1074742796900428journal_volume
66pub_type
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