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electroencephalography (EEG) exam questions and answers

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electroencephalography (EEG) exam questions and answers

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  • October 23, 2024
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  • Exam (elaborations)
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  • EEG
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millyphilip
electroencephalography (EEG) exam
questions and answers

electroencephalography ii(EEG) ii- iiAnswers ii-electrical iiactivity iirecorded iivia iielectrodes
iion iithe iiscalp ii
• iiHigh iitemporal iiresolution ii(millisecond iiscale) iiand iilow iispatial iiresolution

• iiVladimirovich ii(1912) ii• iifirst iianimal iiEEG iistudy ii(dogs) ii
• iiCybulski ii(1914) ii• iifirst iiEEG iirecordings iiof iiinduced iiseizures ii
• iiBerger ii(1924) ii• iifirst iihuman iiEEG iirecordings ii• ii'invented' iithe iiterm
iielectroencephalogram ii(EEG)


What iidoes iiEEG iirecord: ii- iiAnswers ii-Mainly iiNOISE!! iiThe iielectrical iiactivity iiflows
iithrough iithe iitissue iibetween iithe iielectrical iigenerator iiand iithe iirecording iielectrode


The iiEEG iiis iia ii2-D iirepresentation iiof iia ii3-D iireality, iiwhich iiposes iia iiproblem iiin
iilocalising iithe iisources iiof iithe iielectrical iiactivity


Neurophysiological iibasis iiof iiEEG: ii- iiAnswers ii-• iiSingle iineuron iiactivity iiis iitoo iismall
iito iibe iipicked iiup iiby iiEEG ii
• iiEEG iireflects iithe iisummation iiof iithe iisynchronous iiactivity iiof iimany iineurons iiwith
iisimilar iispatial iiorientations ii
• iiCortical iipyramidal iineurons iiproduce iimost iiof iithe iiEEG iisignal

Neural iibasis iiof iiEEG: ii- iiAnswers ii-Pyramidal iineurons iiare iispatially iialigned iiand
iiperpendicular iito iithe iicortical iisurface. ii
Thus, iiEEG iirepresents iimainly iithe iipostsynaptic iipotentials iiof iipyramidal iineurons
iiclose iito iithe iirecording iielectrode.


Neurophysiology iibasis iiof iiEEG ii- iiAnswers ii-Single iineutron iiactivity iiis iitoo iismall iito
iibe iipicked iiup iiby iiEEG ii
EEG iireflects iithe iisummation iiof iithe iisynchronous iiactivity iiof iimany iineurones iiwith
iisimilar iispatial iiorientations ii
Deep iisources ii(subcritical iiareas) iiare iimuch iimore iidifficult iito iidetect iithan iicurrent
iinear iithe iiskull


Psychiatric iidisorder iidiagnosis ii- iiAnswers ii-•Attention iideficit iidisorder ii•Autism ii
•Behavioral iideficits, iiso iithere iimust iibe iineural iimarkers..?

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