4.3 Sleep Stages Flashcards
Brain waves during REM sleep are very ______ to brain waves during wakefullness
Similar
The first three stages of sleep are what stage of sleep?
NREM contains the first three stages
When does stage 1 sleep occur?
Between wakefulness and sleep
What waves does stage 1 sleep produce in it’s early beginning?
Alpha waves
What waves does stage 1 sleep produce later in it’s process?
Theta waves
Which has less frequency? Alpha or Theta waves?
Theta waves
What two characters of sleep appear during Stage 2 sleep?
Sleep spindles and K-complexes
What are sleep spindles?
Rapid bursts of higher frequency brain waves
Why are sleep spindles important?
They aid learning and memory after sleep
What are K-complexes?
High amplitude patterns in response to environmental stimuli
What do sleep spindles interrupt during stage 2 sleep?
Sleep spindles interrupt the domination of theta waves during stage 2 sleep
What stage of sleep is known as “deep sleep” or “slow-wave” sleep?
Stage 3
What waves take place in Stage 3 of sleep?
Delta waves
What happens to heart rate and respiration during stage 3 of sleep?
Heart rate and respiration DRAMATICALLY slow down.
Rank these waves in order from lowest frequencies to highest frequencies. 1 being the lowest, 3 being the highest.
Alpha, Theta, Delta
- Delta Waves
- Theta Waves
- Alpha Waves
