Epileptic focus location: spectral analysis method.
A spectral analysis technique for locating the site of an epileptic focus in the cat brain with the use of multielectrode data, obtained during a generalized seizure, is described. The data, indicating widespread appearance of epileptic activity, does not lend itself to conclusive analysis by conventional means. Three channels of data are examined at a time. One channel is said to drive the other channels if the first channel explains or accounts for the linear relation between the other two over a frequency interval corresponding to the interval of greatest energy concentration. The method of analysis involves computation of the coherence and partial coherence between data from all electrode pairs.
D000818:Animals; D001479:Basal Ganglia / Q000503:physiopathology; D001927:Brain Diseases; D001931:Brain Mapping; D002415:Cats; D002540:Cerebral Cortex / Q000503:physiopathology; D004594:Electrophysiology; D008032:Limbic System / Q000503:physiopathology; D008722:Methods; D012154:Reticular Formation / Q000503:physiopathology; D012640:Seizures; D013057:Spectrum Analysis; D013788:Thalamus / Q000503:physiopathology