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