Sleep And Memory Lecture Flashcards
(47 cards)
The importance of memory
Learn from past events and adapt
Solve problems and make good decisions
Maintain relationships
Have a sense of self
Three stages of memories
Encoding
Storage
Retrieval
What are the three memory stages critically dependent on?
Sleep
Why is sleep beneficial for memories
We need to be able to access memories to articulate them. The ability to strengthen existing memory is significantly dependent on sleep
What are three parts of polysomnography?
EEG
EOG
EMG
What does an electroencephalography measure?
Brian activity
Why does electrooculography measure?
Eye movement
Where is polysomnography done?
In a lab
Two types of sleep
Rapid eye movement and non-rapid eye movement
4 stages of sleep
REM
NREM1
NREM2
NREM3 (slow wave sleep)
How long is each sleep cycle?
90 minutes
Is each cycle the same?
No, REM to NREM ratio shifts
What sleep increases throughout the night
REM
What does an EEG look like during wake
Low amplitude with mixed frequency
EOG during wakefulness
Eye blinks
Reading eye movement
EMG during wakefulness
Muscle activity higher here than in sleep
Sleep Stage N1 EEG
low amplitude mixed frequency
Slower than wakefulness
Sleep stage N1 EOG
Slow rolling eye movements
Sleep stage N1 EMG
Lower than wakefulness but higher than REM sleep
Sleep stage N2 EEG
K complex ( negative deflection - positive component)
Sleep spindles
N2 EOG
Unremarkable
N2 EMG
Lower than wakefulness but higher than REM sleep
SWS EEG
Slow wave activity
SWS EOG
Unremarkable
