Lesions of Nucleus Taeniae of the Amygdala Affect Feeding and Fear Behaviour in Birds.

[Speaker] Ikebuchi, Maki:1,2
[Co-author] Bischof, Hans-joachim:4, Okanoya, Kazuo:1,2,3
1:RIKEN (Japan), 2:JST, ERATO, OKANOYA Emotional Information Project (Japan), 3:University of Tokyo (Japan), 4:University of Bielefeld (Germany)

The amygdala of the mammal is important for the control of a variety of social and emotional behaviours. A famous example is the lack of fear in rhesus monkeys with an amygdala lesion. We have, like others, previously shown that the avian homologue of the mammalian medial amygdala, the nucleus taeniae of the amygdala (TnA) in the arcopallium, is also involved in the control of social and sexual behaviour. Here we observed feeding behaviour in TnA lesioned Bengalese finch males and their family birds that were presented with novel objects in the food cup. Birds with a larger lesion in TnA showed feeding behaviour even when they were presented with alien objects. However, at the same time, they also showed fear or conflict related behaviour. These results suggest TnA may control complex behaviour related with emotional and social contexts, not just a control of single behavioural components. (Supported by JST-ERATO)
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