Relier Pairs sleep and dreamsVersion en ligne sleep and dreams par cate chodnicki 1 sleep functions 2 theta waves 3 freud's wish fulfillment 4 Insomnia 5 narcolepsy 6 circadian rhythm 7 alpha wave 8 sleep cycle 9 beta wave 10 information processing theory difficulty falling asleep or staying asleep awake and alert awake and relaxed sudden attacks of overwhelming sleepiness helps sort through day's events and consolidate memories biological clock slow waves of light sleep protection, recovery, memory, and growth dreams express unacceptable feelings 90 minute repeating pattern of NREM and REM sleep