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