Arrangement for analyzing local bioelectric currents in biologic

Details Arrangement for analyzing local bioelectric currents in biologic Arrangement for analyzing local bioelectric currents in biologic

1989-08-15

1990-12-04

Jaworski, Francis

Surgery

Truss

Pad

128732, A61N 504

Patent

active

049746022

ABSTRACT:
In an arrangement for analyzing local bioelectric currents in biological tissue complexes, electrical signals measured by EEG and/or MEG sensors are supplied to a pattern recognition unit in which defined signal patterns are acquired and are provided with time markings to produce "templates." The templates are forwarded to a correlation unit which compares the continuous measured values to the templates, and calculates a correlation coefficient based on the comparison. A threshold definition unit identifies signal patterns from the continuously measured signal which transgress the threshold, and supplies the threshold-transgressing signal patterns to a comparison unit which compares the correlated signal to the threshold-transgressing signal. Signal patterns are selected based on this comparison which are temporally and spatially identical, and are supplied to an averaging unit, which forms temporal averages of the selected signal patterns. A localization unit identifies the geometrical location of any source in the pattern which is pathologically electrically active. These geometrical locations are supplied to a monitor together with a tomographic portrayal of the same region of the subject, and are superimposed on the tomograph display.

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"New Method for the Study of Spontaneous Brain Activity, " Ilmoniemi et al., Biomagnetism 1987, Proceedings of the 6th International Conference on Biomagnetism.

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