Experimental stationary potential recorded with using spine and skull model.

This study aims at investigating experimentally the structural effects of various shapes of volume conductors, which are surrounded by an insulated skull and spinal canal model, on nerve action potentials (NAP). NAP were recorded through volume conductors inside and outside a model. We noted stationary potentials emerged at where the volume conductor made structural transitions. These results were analyzed using the field diagram of isopotential curves. The diagrams of the electrical field demonstrated that the stationary potentials arise owing to abrupt disequilibrium of the electrical field brought about by the change of the volume conductor surrounded by the insulated model.