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Electroencenphalogram (EEG) electrodes to scalp to monitor brains activity
Electromygram (EMG) electrodes to face to monitor muscle activity
Electro-oculogram (EOG) electrodes attached around eyes monitor eye movements
wakefulness Alpha and Beta activity
sleep Beta, Theta and Delta activity
Stage 1/Theta Theta brainwave activity Transition period between sleep and wakefulness Hypnic jerks (muscle contractions followed by relaxation) Falling sensation
Stage 2/sleep spindles and K complexes Ten minutes after stage 1 EEG is generally irregular during Stage 2 Contains Sleep Spindles and K Complexes Sleeping soundly, but might not believe so if wakened
K Complexes are isolated periods of neural inhibition
Sleep spindles are used for the consolidation of memory and are correlated with intelligence.
Stage 3/slow wave, Delta 15 minutes after stage 2 Characterized by high-amplitude Delta activity Also referred to as “slow wave” sleep Deepest stage of sleep
REM Sleep/Theta and Beta 90 minutes after we begin sleeping Desynchronized EEG Rapid eye movements Loss of muscle tone (paralysis) When wakened, people are alert and attentive Brain is very active during this stage Male penis and female clitoris active during this stage
sleep stages Sleep Cycles are typically 90 minutes each Alternate between stages and spend about 20-30 minutes in REM
Slow-Wave Sleep EEG synchrony (slow waves) moderate muscle tonus slow or absent eye movements lack of genital activity
Created by: Dalea
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