wave patterns
Terms
undefined, object
copy deck
- Frequency of alpha
- 8-13 hz
- frequency of beta
- 14 hz and higher
- frequency of theta
- 4-7.5 hz
- frequency of delta
- less than 4 hz
-
attenuates with eye opening and concentration.
Normal awake pattern.
Bilaterally synchronous or posteriorly dominant. - alpha
- anterior central or frontocentral. Normal awake pattern. Accentuated by medications
- beta
- normal component of drowsiness and sleep
- theta
- 4 wave patterns
- alpha, beta, theta and delta
- Maximal over the central vertex. Seen at onset of stage 2
- Vertex waves
- 12-14 hz waves lasting at least 0.5 seconds.
- sleep spindles
- negative sharp waves followed by a positive component. lasting at least 0.5 seconds
- K complexes
- What is the amplitude criteria for sleep spindles and k complexes.
- There is no amplitude criteria for spindles or k complexes
- delta waves are i the range of _______ hz and must be at least _______ uV
-
0.5 to 2 hz
75 uV