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Abstract

A magnetoencephalogram (MEG) method and system for detecting and analyzing the magnetic effects of brain waves uses a dewar having a helmet-shaped cavity and an array of magnetic field detectors arranged in an array. In one embodiment the field detectors are located in the same relative locations as electrodes in the EEG 10/20 system. A subject's MEG data is compared to a normative spontaneous and/or evoked MEG database collected using standardized detector positions and sensory stimuli and/or to a normative QEEG database simultaneously or previously constructed using corresponding standardized electrode positions and sensory stimuli. Statistical parameters in these databases assess the probability that MEG features derived from a subject are within normal limits. Deviations are indicated on interpolated statistical probability maps color-coded to indicate degree of abnormality. Multivariate statistical analyses may be used to categorize brain disorders in individual patients.

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