A plurality of pairs of electrical contacts are applied to the head, the pairs being applied simultaneously or in sequence. Each pair of contacts is in bilateral symmetry. The brain waves from each pair of contacts are amplified and compared to provide a correlation coefficient between the signals. Preferably the correlation is obtained by an electric automatic polarity coincidence correlator. The correlation coefficient may be utilized as an aid in the diagnosis of certain types of brain injury.
METHOD AND SYSTEM FOR BRAIN WAVE ANALYSIS