Quiz Form

Question Date: 20/11/2023

Question: EEG potentials are manly generated by

Options:

• Axon potentials
• Dendritic potentials
• Summation of EPSP and IPSP
• All of the above

Correct Answer: Summation of EPSP and IPSP

Explaination: A conventional EEG is a spatial map recorded at the scalp surface, which records the synaptic activity of the cortex beneath<br>EEG signals are generated due to summation of the excitatory and inhibitory potentials across the neurons<br>Sink is the site where extracellular space is relatively negative and positive ions rush in to depolarize while source is the site where extracellular space is relatively positive and current flows out of the cell<br>The excitatory post-synaptic potentials generate negative EEG waveforms while the inhibitory potentials generate the positive waveforms<br>Simultaneously synchronized net IPSPs and EPSPs over at least 10cm2 are required to be recorded by a scalp electrode as a specific discharge or pattern

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