Sleep Active process
Decreased responses
Is a behavior
Stages
-1 sleep EEG Low voltage
High frequency (slower than awake)
- Initial stage 1 First after falling asleep
No changes in EOG and EOG
- Emerge stage 1 Later stage 1 sleep
Accompanied by REMs
o REM Rapid eye movement
Period in which we dream
Low voltage
Fast EEG
Reduction of core-muscle tone
EEG desynchronization
Nonexplicit learning
More REM sleep if it is deprived (rebound)
o Default theory: difficult to stay in
NonREM sleep so it switches to REM
Activation Why we dream
synthesis theory During REM cerebellum bombards cortex with
random signal
Cortex want to make sense out of them
(Dream)
-2 sleep EEG Higher amplitude and lower frequencies
- K complexes Single large negative wave followed by single positive
wave (negative up/ positive down)
- Sleep spindle Short burst of 12- to 14-Hz waves
-3 sleep EEG Slow wave sleep
- Delta waves Largest and slowest EEG waves
Each cycle is about 90 minutes
If night goes further more time in stage 1 and
less in other
Measurement of
stages
-EEG Electroencephalogram (see task 4)
-EOG Electrooculugram
Measurement of eye movement
-EMG Electromyogram
Measure muscle toning in the neck
Function of sleep
- Recuperation Being awake disturbs homeostasis
theory Sleep is required to restore it
Long periods of wakefulness produces
Decreased responses
Is a behavior
Stages
-1 sleep EEG Low voltage
High frequency (slower than awake)
- Initial stage 1 First after falling asleep
No changes in EOG and EOG
- Emerge stage 1 Later stage 1 sleep
Accompanied by REMs
o REM Rapid eye movement
Period in which we dream
Low voltage
Fast EEG
Reduction of core-muscle tone
EEG desynchronization
Nonexplicit learning
More REM sleep if it is deprived (rebound)
o Default theory: difficult to stay in
NonREM sleep so it switches to REM
Activation Why we dream
synthesis theory During REM cerebellum bombards cortex with
random signal
Cortex want to make sense out of them
(Dream)
-2 sleep EEG Higher amplitude and lower frequencies
- K complexes Single large negative wave followed by single positive
wave (negative up/ positive down)
- Sleep spindle Short burst of 12- to 14-Hz waves
-3 sleep EEG Slow wave sleep
- Delta waves Largest and slowest EEG waves
Each cycle is about 90 minutes
If night goes further more time in stage 1 and
less in other
Measurement of
stages
-EEG Electroencephalogram (see task 4)
-EOG Electrooculugram
Measurement of eye movement
-EMG Electromyogram
Measure muscle toning in the neck
Function of sleep
- Recuperation Being awake disturbs homeostasis
theory Sleep is required to restore it
Long periods of wakefulness produces
