PSYC 1010 Chapter Notes -Melatonin, Delta Wave, Sleep Deprivation

• School: York University
• Department: Psychology
• Course: PSYC 1010
• Professor: Rebecca Jubis

Document Summary

Our bodies roughly synchronize with the 24-hour cycle of day and night by this internal biological clock. Every 90 minutes we cycle through four distinct sleeps stages. The transition is marked by the slowed breathing and the irregular brain waves of non- When you are in bed with your eyes closed; there are slow alpha waves of your awake but relaxed state. Sleep periodic, easily reversible loss of consciousness. During this brief nrem-1 sleep you may experience hallucinations sensory experiences that occur without a sensory stimulus. Hypnagogic sensations may later be incorporated into your memories. Then you relax more deeply and being about 20 minutes of nrem-2 sleep, with its periodic sleep spindles bursts of rapid, rhythmic brain-wave activity. Transition into deep sleep of nrem-3, lasts about 30 minutes, your brain emits large, slow delta waves and you"re hard to awaken. Rem sleep recurring sleep stage during which vivid dreams commonly occur.