研究人员说,这发生在第一次深度睡眠期间。
It was specifically observed that the left side of the brain was more active during deep sleep.人们特别注意到,在深度睡眠时,左脑更加活跃。
During deep sleep, the participants' brains behaved in a similar manner seen in birds and dolphins.深度睡眠时,参与者的大脑表现与鸟类、海豚相似。
deep sleep is associated with slow brain waves, and larks spent 50% more time in such slow-wave sleep than owls did.睡眠之深与否与慢波有关,而百灵鸟型处于慢波睡眠的时间比夜猫子型多50%甚至更多。