EEGandauditoryevokedpotentials
●Periodicpatterns:Distinctwaveforms
repeatingwithregularintervals(from
0.5toseveralseconds).Periodic
patternsthatarecharacterizedby
sharpwavesorspikesareknownas
epileptiform.
●Burstsuppression:Highamplitude
EEGpatternswithinterveninglow
amplitudeactivity.Thedurationmay
varyfrom<0.5secondstoseveral
seconds.
TechnicalartifactandEEG
Todecreasetechnicalartifact,theelectrode-toskin-impedanceshouldbelowand
electrodewiresshort.Wrappingtheelectrodewirestogetheroradjustingground
electrodesmayalsohelp.
TypicalEEGrecordingswithelectricalinterference
●Electricalcurrents(AC):Thesearea
commonsourceofinterference.Try
usingdifferentlow-passornotchltersto
eliminatethem.
●Eyemovements:Patienteyemovements
causetypicalpatternsintheEEG
waveform.
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