The evoked potential processing system includes, in one embodiment, a spectral averaging method. Time based, digital pre-stimulus and post-stimulus electroencephalographic (EEG) signal streams are obtained and are converted into frequency spectrum signals. A differential spectrum is obtained. The differential...http://www.google.com/patents/US5230344?utm_source=gb-gplus-sharePatent US5230344 - Evoked potential processing system with spectral averaging, adaptive averaging, two dimensional filters, electrode configuration and method therefor
