State of the multichannel magnetoencephalography.
It could be demonstrated in many investigations with single- or several- channel magnetic recording instruments that, a focal pathological source could be located mainly in close connection to verified brain lesions. Our experience with a 37- channel instrument did support these results. In addition, we had available the whole dynamics of the brain activity in time and space, but it must be considered, that the pathological activity is mixed more or less with the background activity. One simple method to separate partly both activities is the "dipole density plot" (DDP), which concentrates the density of dipoles in areas of focal pathological activity.
Vieth
J
J
Dept. exp. Neuropsychiatry, University of Erlangen, Federal Republic of Germany.
D001921:Brain / Q000503:physiopathology; D001929:Brain Edema / Q000175:diagnosis / Q000503:physiopathology; D002543:Cerebral Hemorrhage / Q000175:diagnosis / Q000503:physiopathology; D004574:Electromagnetic Fields; D006801:Humans; D015225:Magnetoencephalography / Q000295:instrumentation*; D008838:Microcomputers; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*