SLEEP By N., Pam M.S. - April 13, 2013 a state featuring relaxation, reduced metabolism and relative insensitivity to stimulation. We have unique brain wave patterns for sleeping and different stages. See dream state; REM sleep; NREM sleep. SLEEP: "Sleep is different to losing consciousness from injury or disease." Related Psychology Terms DREAM STATE (D-STATE) SLEEP CYCLE BRAIN-WAVE THERAPY W-STATE STAGE 3 SLEEP ELECTROSLEEP THERAPY REM SLEEP ORTHODOX SLEEP SLEEP STAGES SPINDLE WAVES Cite this page: N., Pam M.S., "SLEEP," in PsychologyDictionary.org, April 13, 2013, https://psychologydictionary.org/sleep/ (accessed April 17, 2021).