Scalp EEG Signals: Generators and Dipoles

The authors explore how scalp EEG signals are generated and the importance of understanding dipole orientation in interpreting these signals accurately. They argue that traditional methods, which focus primarily on negative phase reversals, oversimplify the complexities of cortical current flow, and advocate for a more comprehensive approach that considers both positive and negative polarities to enhance diagnostic accuracy in EEG interpretation. This review emphasizes the significance of electrode placement and simultaneous MEG-EEG recordings in achieving a better understanding of the physiological basis of scalp EEG signals.