山东大学基础医学院：《生理学 Physiology》课程PPT教学课件_The Nervous System 神经系统（含感觉器官）脑电图觉醒与睡眠 Electroencephalogram（EEG）, Wakefulness and Sleep

the electrical WWwlWwMyhwn I 100 uv responses of the Wave activity axon and the dendrites of a large cortical neuron Dendritic tree Current flow to and from active synaptic knobs on the dendrites produces wave activity, while AP are transmitted along the axon 200mV A Xon Action potentials

the electrical responses of the axon and the dendrites of a large cortical neuron. 2. Mechanism of EEG Current flow to and from active synaptic knobs on the dendrites produces wave activity, while AP are transmitted along the axon

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 formation

Mechanism 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