Smooth electrical activity of 8-12 Hz recorded from the brain; generally associated with state of relaxation.
Irregular electrical activity of 13-30 Hz recorded from the brain; generally associated with a state of arousal
EEG activity of 3.5-7.5 Hz that occurs intermittently during early stages of slow-wave sleep and REM sleep
Regular, synchronous electrical activity of less than 4 Hz recorded from the brain; occurs during the deepest stages of slow wave sleep
The stage with the transition between wakefulness and sleep. Eye lids open and the eyes roll up and down.
Short bursts of waves of 12-14 Hz that occur between two and five times a minute during stages 1-4 of Sleep
Sudden, sharp wave forms that are usually found only during stage 2 sleep. Occur at a rate of about one per minute but can also be triggered by noises
This stage contains 20-50 percent delta activity
Stage that contains more than 50 percent delta activity
A period of desynchronized EEG activity during sleep, at which time dreaming and muscular paralysis occur. Also called paradoxical sleep.
A 90-minute cycle of waxing and waning alertness, controlled by a biological clock in the caudal brain stem; controls cycles of REM sleep and slow-wave sleep
Basic rest-activity cycle
Sleep characterized by synchronized EEG activity during its deeper stages.
If you deprive people of sleep, what type of sleep do they make up?
People make up slow-wave sleep, as the cycles become longer. But they don't make up total sleep.
A loss of slow wave sleep and decreased REM sleep. Can cause insomnia and damage to the thalmus.
Fatal familial insomnia
Infants engage in mostly what kind of sleep?
This sleep disorder affects 25% of the population. Can cause anxiety and depression.
A sleep disorder when breathing stops during sleep.
A sleep disorder where that has to do with the central nervous system's inability to control REM. You can begin REMing at any point during the day.
A part of narcolepsy where there is muscular paralysis but the person is awake. It is triggered by strong emotion or sudden movement.
When a person is close to falling asleep or just woke up and cannot move.
When a person dreams during sleep paralysis (sees people in the room)
When there is no physical paralysis and people physically act out dreams.
REM without atonia
A slow wave sleep disorder that is very common in children and adolescence.
A slow wave sleep disorder where a person goes from stage 4 to stage 1 in about 30 seconds. Shocks the nervous system
Sleep duration can depend on
body size. The larger you are the longer you sleep
Daily rhythmic changes in behavior and physiological processes.
This is the part of the body that works with circadian rhythms. Part of the hypothalmus on top of the optic chiasm. This is our biological clock.
Attached to the dorsal tectum; produces melatonin and plays a role in seasonal rhythms.