The brain is as active during rem ( rapid eye movement ) sleep - when most vivid dreams occur - as it is when fully awake , says dr , eric nofzinger at the university of pittsburgh 皮斯堡大學的教授說到,熟睡時在眼睛快速轉(zhuǎn)動的時候大腦是活躍的- - -當產(chǎn)生生動的夢境時- -那個時候大腦是完全清醒的。