A method and system for extracting important signal information is disclosed. The method examines a group of signals obtained from testing of a patient s nervous system and finds a signal area of interest. Once a cluster of signals that all have the area of interest is found the system concludes that the area of interest is located and validated. Signals that are not within the cluster are rejected and the signals within the cluster are signal averaged to yield a signal averaged waveform. The signal averaged waveform represents the results of the test.
