Dorsomedial pallium lesions impair taste aversion learning in goldfish

Spatial learning-related changes in metabolic brain activity contribute to the delimitation of the hippocampal pallium in goldfish

“…Instead, our results are consistent with the hypotheses based on neuroanatomical and developmental data proposing that at least part of Dm is homologous to the pallial amygdala of mammals [3,5,11]. These hypotheses have received functional support from studies showing that Dm in goldfish is critically involved in emotional learning and memory, for example avoidance learning and taste aversion conditioning [15,23,26].…”

“…Furthermore, higher spatial behavior demands in natural environments have been associated with increases in the relative size of Dlv [19], and morphofunctional studies have shown changes in the transcriptional activity of the neurons in Dlv, related to spatial learning [16,20]. Regarding the Dm region, it has been shown that its ventromedial area, similar to the mammalian amygdala, plays a critical role in the emotional conditioning as well as in encoding values and motivational signals [15,[21][22][23][24][25][26][27].…”

Microhabitat Use Affects Brain Size and Structure in Intertidal Gobies

“…Studies by Van Staaden et al [1995] and Huber et al [1997] also found larger telencephalons in cichlid species living in more spatially complex habitats created by shallow rock and vegetation compared to those species living in mid-water. A number of studies have provided evidence for the telencephalon's involvement in various complicated behaviours such as spatial learning [Salas et al, 1996a, b;López et al, 2000], avoidance responses [Portavella et al, 2003[Portavella et al, , 2004, territoriality, shoaling [Shinozuka and Watanabe, 2004;Martín et al, 2011] and reproductive behaviours such as mating strategy, courtship, nest building and parental care [Overmeir and Gross, 1974;Koyama et al, 1984;Pollen et al, 2007;Broglio et al, 2011].…”

Brain and Cognition in Teleost Fish

“…Another learning process that has been recently related to the dorsomedial pallium in teleosts is taste aversion learning (Martín et al 2011). Goldfish learn to avoid the ingestion of a flavour paired with visceral discomfort, when trained in a delayed procedure which consists of the presentation of two flavours on different days, one followed by lithium chloride and the other by saline, both after a 10-minute delay.…”