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