Effect of nucleus accumbens lesions on socially motivated behaviour of young domestic chicks.

摘要: Behaviour of young domestic chicks when isolated from conspecifics is influenced by two conflicting drives: fear potential predator and craving for company. The nucleus accumbens (Ac) has been suggested to influence social behaviour, as well motivation in goal-directed tasks. In this study, the Ac 1-day-old was lesioned bilaterally, using radiofrequency method. Open field behaviour before after presenting a silhouette bird prey recorded, followed behavioural test measure group size preference chicks. Ac-lesioned individuals emitted more distress calls ambulated open test, however, they reacted predatory stimulus very similarly control chicks: their vocalization reduced intergroup difference motor activity also disappeared. There no between latency approach both groups chose larger flock (eight) over smaller one (three). Concerning role sham birds evident here only absence detectable (predator or conspecifics). These findings may reflect either decreased exposure predators increased suggesting that likely function modulate goal-driven, including socially driven, behaviours, especially direct representing goal absent. This harmony with known promotion impulsiveness lesions.