Objective To study the effect of propofol on c-fos protein expression of nuclein related to sleep-awakening in rats brain and investigate the possible mechanism of propofol-induced sleeping.Methods Twenty-four SD rats were randomly divided into 4groups:spontaneous sleep group(group A),awaken group(group B),saline group(group C)and propofol group(group D). Immunohistochemical method was used to measure c-fos protein expression of nuclein area related to sleep-awakeing in rat brain.Results Compared with group...