06a_Sleep and Dreaming Flashcards
Sleep wave patterns in order of increasing sleep state
Beta waves
Alpha waves
Theta waves
Delta waves
Beta waves
Alert, fully awake state
Alpha waves
Awake, rested, Relaxed state
Theta waves
Deep relaxation
Light sleep
Delta Waves
Deep sleep
[*mnemonic: D = delta = deep]
Collective term for Sleep Stages 1 through 4
Non-REM sleep (NREM)
5th Stage
REM sleep
Most vivid and elaborate dreams
*Not all dreams occur during this stage
REM sleep EEG pattern
Similar to stage 1 and stage 2
Physiological responses resemble those of awake individuals
Active/Paradoxical Sleep
Term for REM sleep
REM = combination of physiological activity and deep sleep
REM sleep in infants
Infants begin sleep in REM during the first few months of life
Accounts for 50% of sleep for 1st 6 months
Gradually changes to non-REM sleep
Characteristics of newborn sleep patterns
NREM predominated by slow wave activity
Four stages of NREM are not distinguishable until six months of age
REM sleep in adults: percentage of total sleep time
20% of total sleep time
True or False?
Older adults require less sleep than younger adults
False.
Older Adults exhibit Advanced Sleep Phase (ASP)
ASP = going to bed and waking up earlier
Effects of Sleep deprivation for more than 48 hours
Forgetfulness
Disorientation
Hallucinations
Effects of chronic sleep restriction
Impaired working memory, information processing
REM rebound
Individuals spend more time in REM sleep following REM deprivation
Results of REM deprivation
Impaired ability to retain newly learned information
Name the Waves:
Drowsiness, pre-sleep
Alpha waves
Name the Waves:
Stage 1 sleep
Alpha waves are replaced by theta waves
Name the Waves:
Stage 2 sleep
Theta waves predominate
Interrupted by sleep spindles (bursts) and K complexes (drops)
Name the Waves:
Stage 3 sleep
Large, slow delta waves appear
Name the Waves:
Stage 4 sleep
Delta waves dominate
Name the Stages:
“slow-wave sleep”
Stages 3 and 4
Length of time to pass through all five sleep stages
Every 90 to 100 minutes
When does most Stage 3 and 4 sleep occur?
Early part of sleep period
When does most REM occur?
REM periods increase in length of the night progresses