Selective involvement of the goldfish lateral pallium in spatial memory.

摘要: The involvement of the main pallial subdivisions teleost telencephalic pallium in spatial cognition was evaluated a series three experiments. first two compared effects lesions selective to lateral (LP), medial (MP) and dorsal (DP) goldfish, on retention reversal learning constancy task which requires use allocentric or relational strategies. results showed that LP produced impairment capability goldfish solve previously learned same procedure, whereas MP DP did not produce observable deficits. third experiment evaluated, by means AgNOR stain, learning-dependent changes neuronal transcription activity trained cue version only differed their demands. revealed training an increment transcriptive neurons ventral pallium, as indicated increases size nucleolar organizing region (NOR), organelles associated with synthesis ribosomal proteins. In contrast, changes. These data, revealing striking functional similarity between fish amniote hippocampus, provide additional evidence regarding homology both structures.