Dreams
imagination
Electroencephalograph (EEG)
brain waves
Hypersomnia
a condition in which you feel extreme daytime sleepiness despite getting sleep that should be adequate (or more than adequate).
Insomnia
Insomnia is a common sleep disorder
Melatonin
a hormone that your brain produces in response to darkness.
napping
1 hour sleep
Narcolepsy
a chronic neurological disorder that affects the brain's ability to control sleep-wake cycles
night terrors
like a night mare
Nightmares
scary dream
Paranoia
"I got into a state of paranoia about various night noises which in daylight seems utterly silly"
- Sleep
when your eys close
Sleep apnea
a potentially serious sleep disorder in which breathing repeatedly stops and starts.
sleep
when eyes close
Sleep paralysis
a feeling of being conscious but unable to move.
Sleep study
study sleep
Snoring
like a pig
Stage 1 (Non-REM) sleep
your voluntary muscles become immobilized
Stage 2 (Non-REM) sleep
your voluntary muscles become immobilized
Wakefulness
energy
Stage 3 (Non-REM) sleep
your voluntary muscles become immobilized
Stage 4 (REM Sleep)
your voluntary muscles become immobilized