For many years it was assumed that lateralisation was a uniquely human trait, but this notion rapidly fell apart as researchers started uncovering evidence of lateralisation in all sorts of animals.

多年来，人们一直认为偏侧现象是人类独有的特征，但随着研究人员开始在各种动物身上发现偏侧现象的证据，这一观点很快就站不住脚了。