释义 |
sleep stage 3 sleep stage 3 NREMS stage 3 Sleep disorders A stage of NREM sleep Accounts for 4-6% of total sleep time; with stage 4, it constitutes “deep” NREM sleep; often lumped with stage 4 into NREMS stage 3/4 because of lack of documented physiologic differences; appears usually only in 1st third of sleep period |