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Medications
practice for EEG registry
Question | Answer |
---|---|
describe the EEG seen in a patient with chronic alcohol use. | low voltage fast activity, lower amplitude and decreased frequency of alpha. |
What EEG effect is seen with diazepam? | diffuse high amplitude beta |
What EEG changes are seen with phenobarbital? | Frontocentral beta activity |
What is the minimal amount of recording time acceptable when performing clinical EEG? | the baseline should contain at least 20 minutes of technically satisfactory recording |
What is the minimum number of scalp electrodes required when performing a clinical EEG? | All 21 electrodes and placements following the international 10-20 system should be used. |
What are the appropriate filter setting when performing clinical EEG? | The low frequency filter (LFF) should be no higher than 1Hz and the high filter should be no lower than 70 Hz |
Why is the use of the 60 Hz filter discouraged when performing EEG? | The 60 Hz filter can distort or attenuate spikes and should therefore only be used when other measures against 60Hz interference fail. |