Abstract: An apparatus and method for display of biologically induced electrical activity is disclosed. The apparatus includes sensors for measuring EEG or MEG signals from a living body and using these signals to compute one or more dipoles representative of the measured electrical activity. Values of the electrical activity may also be computed for discrete locations in or on the body. The operator has the ability to input a variety of different computational specifications or criteria to facilitate dipole computation. The resulting computed data may be selectively displayed as a dipole within a three-dimensional representation of the body, as a movie-like series of dipoles, as a composite or tracing of dipoles or as various topographic maps. The operator also has the ability to change the display to provide different perspective views or to enlarge the displayed scene.

Abstract: A method and apparatus for evaluating physiological and behavioral functioning of predetermined regions of interest of the human brain by displaying topographical maps of measured information. Brain electrical activity and/or predetermined physical parameters are measured in association with selected neuropsychological tests, and the measured information is operated on by providing weighted output signals characteristic of physiological functioning of the regions of interest of the patient's brain. The resulting weighted output signals are plotted as a topographical map. The measured brain electrical activity and measured predetermined physical parameters are also compared and a conversion matrix developed based on data bases of measured information for normal and abnormal subjects.

Abstract: An apparatus for performing manipulation and analysis of data characteristic of brain electrical activity of a patient. Computer analysis is utilized to provide the most useful form of topographical maps and related data for evaluation of a patient by a user. The application can be operated as part of an integral unit or remote from the location where brain electrical activity signals are measured on the patient.Threshold circuitry ensures that only signals meeting predetermined conditions are stored. A user modifiable digital filter allows for on-line analysis of changes in filter characteristics. A simultaneaous display of a plurality of topographical maps in visual summary format is presented. Readability is enhanced by showing only the color codes that actually appear in the topographical map. Montages can be created.