## Electric Fields of the Brain: The Neurophysics of EEG |

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### Contents

The PhysicsEEG interface | 3 |

Potentials generated in the brain and measured on the scalp 3 Philosophical con | 18 |

Electrode placement and field theory 22 Possible physiological bases for the time | 34 |

Copyright | |

23 other sections not shown

### Common terms and phrases

action potential alpha rhythm amplitude applied approximation association fibers axon cerebral cortex Chapter charge circuit coefficients conductor connections consider constant cortical activity cortical surface corticocortical current density current flow current sources damping dendrites depend dielectric dipole layer dipole source dispersion relation distance distribution EEG recorded effects electric field electrode electrophysiology empirical orthogonal functions epoch equations estimate evoked potentials example excitatory experimental extracellular given halothane homogeneous medium inhibitory inhomogeneous input large number linear macroscopic magnetic field magnitude mass Maxwell's equations measured membrane neural neurons nonlinear normal modes obtained Ohm's law orthogonal functions oscillations parameters peak physiological potential difference potential due propagation velocity pyramidal cells radial range regions roughly scalp EEG scalp potentials scalp surface shown in Fig sinusoidal skull sources and sinks spectral spherical string surface potential synaptic temporal thalamus theoretical theory tion tissue transmembrane potential various vector volume conduction wavenumber