Show:
Measuring Sleep
NREM and REM
Sleep Regulation
Sleep Across the Lifespan
Disorders and Interventions
100
The device that measures brain wave activity during sleep.
Electroencephalograph (EEG)
100
The sleep type when most vivid dreaming occurs.
REM sleep
100
A rhythm that repeats roughly every 24 hours.
Circadian rhythm
100
The age group that spends the highest proportion of sleep in REM.
Newborns (infants)
100
The circadian disorder where sleep onset is consistently delayed by 2 or more hours.
Delayed sleep phase syndrome (DSPS)
200
The device that measures electrical activity of the muscles.
Electromyograph (EMG)
200
The lightest stage of sleep, a transition from wakefulness.
NREM stage 1
200
A rhythm that repeats more than once in 24 hours, such as sleep cycles.
Ultradian rhythm
200
The shift in adolescent sleep timing of up to 2 hours later.
Sleep-wake cycle shift (delayed melatonin release)
200
The circadian disorder common in older adults where they fall asleep and wake early.
Advanced sleep phase disorder (ASPD)
300
The device that detects eye movements during sleep.
Electro-oculograph (EOG)
300
The stage of sleep that dominates the first half of the night.
NREM stage 3 (deep sleep)
300
The brain structure known as the body's master clock.
Suprachiasmatic nucleus (SCN)
300
The blood alcohol concentration that 17 hours of sleep deprivation is roughly equal to.
0.05% BAC
300
The disorder that affects people who work at times outside the normal sleep-wake cycle.
Shift work disorder
400
A self-report record of sleep habits kept over days or weeks.
Sleep diary
400
The approximate length of one sleep cycle in an adult.
About 90 minutes
400
The hormone released by the pineal gland that promotes sleepiness.
Melatonin
400
The blood alcohol concentration that 24 hours of sleep deprivation is roughly equal to.
0.10% BAC
400
The intervention using timed exposure to bright light to shift the circadian rhythm.
Bright light therapy
500
The EEG pattern shown in NREM stage 3.
High amplitude, low frequency delta waves
500
Why REM sleep is described as paradoxical.
The brain is highly active but the body is almost paralysed (atonia)
500
An external cue, like sunlight, that resets the circadian rhythm.
Zeitgeber
500
Two affective effects of partial sleep deprivation.
e.g. irritability, mood swings, heightened anxiety, amplified emotional reactions
500
Habits that improve sleep, like avoiding screens before bed and keeping a regular bedtime.
Sleep hygiene