Mechanism of eeg wW"工 EEG Signals generated by cortex Dendritic tree Currents in extracellular space generated by summation of EPSPs and IPsPs 山L 200mV Axon Action potentials Continuous graph of changing voltage fields at scalp surface resulting from ongoing synaptic activity in underlying cortex Inputs from subcortical structures Thalamus Brainstem reticular formationMechanism of EEG ⚫ Continuous graph of changing voltage fields at scalp surface resulting from ongoing synaptic activity in underlying cortex ⚫ Inputs from subcortical structures – Thalamus – Brainstem reticular formation • EEG signals generated by cortex • Currents in extracellular space generated by summation of EPSPs and IPSPs