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9 Cards in this Set
- Front
- Back
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AWAKE IS DEFINED BY
EEG (BRAIN SIGNALS) THAT ARE FAST OR SLOW? |
FAST
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ARE THE FAST EEG SIGNALS OF AN AWAKE BRAIN IN THE ALPHA AND BETA RANGE?
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YES
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IF EEG SIGNALS RECORDED ARE SLOWER THAN ALPHA (8-13HZ) THE BRAIN IS IN STAGE N1?
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NO
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A 30SEC PERIOD OF A PSG RECORDING (AN EPOCH) IS
THE STANDARD FOR SLEEP STAGING? |
YES
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AN EPOCH OF WAKE ALWAYS HAS
BRAIN SIGNALS IN THE ALPHA RANGE FOR A PERIOD OF 30SEC? |
NO (some waves could be faster - some slower than alpha ...but alpha is predominate) |
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WHAT PERCENTAGE OF THE BRAIN SIGNALS EEG... OF A RECORDED 30SEC EPOCH NEEDS TO BE ALPHA TO BE SCORED AWAKE?
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50%
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IS IT ABNORMAL TO
HAVE A COUPLE THETA WAVES (4-7HZ) MIXED IN WITH ALPHA WHEN CLEARLY AWAKE? |
YES
(NEUROLOGISTS LOOK FOR THIS WHEN READING EEG RECORDS) |
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WHEN FALLING ASLEEP IS IT NORMAL TO HAVE EPOCHS OF EEG SIGNALS THAT CONTAIN BOTH ALPHA BETA AND THETA
WAVES? |
YES
(and the epoch is scored awake if 50% or greater is alpha waves) |
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EVERYONE HAS EEG ALPHA WAVES
IN RANGE (8-13HZ) WHILE AWAKE? |
NO
(about 6% of population has no alpha rhythm ) |
