Class 3 - Sleep Stages Flashcards
1
Q
What is the reticular Activating System? (3)
A
- complex bundle of brain nerves responsible for regulating wakefulness and sleep-wake transitions
- need calm mind and body
- in lecture, also noise/processing time for messages
2
Q
What are the 2 main phases of sleep?
A
REM and NREM
- NREM has 3 stages, 1,2,3
3
Q
How long does a full sleep cycle take?
A
90-110 minutes
- most people cycle through 4-6 cycles per night
4
Q
What measures the electrical activity in the brain while asleep?
A
EEG or electroencephalogram
5
Q
REM, N1, N2, N3 chart (know this!!)
A
6
Q
What kind of waves are produced when you are awake? Drowsy?
A
awake - beta waves
Drowsy - Alpha waves
7
Q
What occurs in N1 stage of NREM? (4)
A
- theta waves
- light sleep
- hypnotic jerks
- hypnogogic hallucinations
8
Q
What occurs in the N2 stage?
A
- sleep spindles and K complexes
9
Q
What occurs in the N3 stage? (3)
A
- delta waves
- deep sleep (slow wave sleep)
- GH releases
10
Q
What occurs in REM? (4)
A
- dream
- muscle paralysis
- paradoxical sleep
- memory and learning
11
Q
Sleep waves chart
A
12
Q
Why is sleep important? (7)
A
- healing and repairing our body
- healthy brain function and emotional wellbeing
- physical health
- daytime performance
- immune system
- hormones, muscle mass, etc
13
Q
What is microsleeping? (2)
A
- zone out and snap out of it
- brief moments of sleep when someone is awake
14
Q
Age to sleep ratio chart
A
15
Q
Sleep needs vary by which factors? (5)
A
- age (more sleep needed during rapid growth)
- health - stress and illness
- genetics
- sleep debt
- circadian rhythm
16
Q
What is sleep state fragmentation?
A
- children tend to sleep more soundly and deeply
- sleep of older adults are more fragmented and lighter
