Scalp electrodes

Accurate localization of EEG scalp electrodes is crucial for precisely estimating the underlying neuronal activity from observed electrical potential changes on the scalp. Various techniques for electrode localization have been proposed, categorized into direct measurements on the subject's head or indirect methods utilizing structural MRI scans. Most direct measurement methods are expensive as they rely on complex stereo vision systems or are magnetic-field-driven, making them especially inconvenient for experiments involving simultaneous EEG-fMRI acquisition and cannot be used in the vicinit

…a constant current with surface electrodes, measuring the voltage change associated with neural depolarization and reconstructing images of the activity. However, EIT with scalp electrodes was unsuccessful in vivo. MDEIT could improve image quality by measuring the magnetic field which is not attenuated by the skull. Aims. Image simulated neural activity in the human brain using MDEIT and EIT with sca