What is the frequency of beta waves
> 13Hz
What is the frequency of alpha waves
8-13Hz
What is the key sign of Alpha Waves?
Chaotic
What is the frequency of Theta waves
4-7.99
What is the frequency of Delta waves
0-3.99 Hz
When would you see beta waves
Awake, eyes open
When do you see Alpha Waves
Awake, with eyes closed
What happens during stage N1
Theta
Low-voltage, mixed frequency
Slow eye movements (SEM)
Vertex sharp Waves
What does a vertex shape wave look like
A big QRS
What does slow eye movement look like
Waves or fins
What does rapid eye movement look like
Shape fin spikes
What are the stages of sleep
Beta
Alpha
N1
N2
N3
What occurred during N2
Theta
K-complex
Neg then posit
> or = 0.5 seconds
Sleep spindles
> or = 0.5 seconds
What direction is negative
Upwards
K-complex it wide and goes up then down
What occurs during N3 stage
Delta
0.5-2 Hz
> 75 microvolts
> or = 20% epoch
What is Epoch
Wide complex’s that occupy much of the strip
What occurs during REM
Theta
Low-voltage
Sawtooth waves (2-6 Hz)
Muscle (chin) atonia
Phasic vs. tonic
Normal sleep cycle when first going to sleep
Wake: 10-20 min
N1: 1-7 min
N2: 10-25
N3: 20-40
REM: 1-5 min
Normal sleep percentage
Wake: <5%
N1: = 5%
N2: 45-55%
N3: 20%
REM: 20%
What stage occupies first third of sleep
N3
What stage occupies last third of sleep
REM
How many NREM and REM periods are there
4-6
