Electrography system employing layered electrodes for improved spatial resolution

An electrography system, comprising:

• an array of conductive electrodes arranged into two or more stacked electrode layers extending across a surface and being spatially separated in a direction orthogonal to the surface, the electrodes being operative to generate respective electrode signals collectively conveying surface-parallel components and surface-orthogonal components of a pattern of physiological electrical activity sensed by the electrodes at the surface, the surface-parallel components being tangential to the surface and the surface-orthogonal components being orthogonal to the surface;
• signal processing circuitry configured and operative to receive the electrode signals and to generate, based on the surface-parallel components and derivatives of the surface-orthogonal components, a set of electrography signals representing the pattern of physiological electrical activity;
• and
• a recording component configured and operative to record the electrography signals in a manner enabling application-specific use thereof.