Matching Pairs Adaptable Brain,Sleep,&DreamsOnline version Important terms, and subjects that you should know about how your brain adapts, and what happens when you sleep and dream. by Gisselle Padilla 1 What is a circadian rhythm? 2 What's the difference between alpha, theta waves? 3 Is Id conscious, or unconscious? 4 What are examples of depressants? 5 What are the benefits of sleeping? 6 Drugs considered a stimulant? 7 Stage where you have rapid eye movements this is where most dreams occur. Which stage is this? 8 Is ego unconscious, or conscious? 9 What stage do sleep terrors happen in? 10 What symptoms of hallucinogens? morphine, codeine, oxycodone, heroin, alcohol Stage 3 NREM. Conscious caffeine, nicotine, cocaine, methamphetamine. 24 to 25 hour biological clock that tells you when you should go to sleep, and when to wake up. Energy conservation, repairing of cells, and pituitary releases growth hormones. One is awake and relaxed.While the other has slow regular waves. Unconscious mild delusions, relaxation, panic, and reduced motivation. REM stage.