Hemispheric laterality and emotion in chickens

本研究旨在探讨情绪与鸡大脑半球偏侧化的关系。在中枢单胺偏侧化方面，应激状态下，鸡右半球HVA/DA和5-HIAA/5-HT比值显著高于左半球。此外，血浆CORT浓度与端脑5-HIAA/5-HT偏侧化指数呈正相关。有人认为，右半球的情绪处理可能是最佳的DA能和/或多巴胺能侧化，而无论是减少或增加，这种侧化可能会恢复在动物遭受压力。此外，积极情绪诱导的治疗倾向于减弱压力源，但我们无法找到大脑不对称性和行为偏侧化之间的关系。

The objective of the present study was to investigate the relationship between emotion and hemispheric laterality in chickens. Regarding central monoamine laterality, the ratios of HVA/DA and 5-HIAA/5-HT in the right hemisphere were significantly higher than those in the left hemisphere of chickens on stress conditions. In addition, plasma CORT concentrations correlated positively with the laterality index of 5-HIAA/5-HT in the telencephalon of chickens. It has been suggested that emotional processing in the right hemisphere might be optimal with DAergic and/or serotonergic lateralization, whereas either a decrease or an increase in this lateralization might be reinstated in animals suffering stress. In addition, positive emotion-induced treatment tended to attenuate stressors, but we could not find the relationship between brain asymmetry and behavioral laterality.