Brain electrical activity mapping
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United States of America Patent
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-
Oct 4, 1983
Grant Date -
N/A
app pub date -
May 15, 1981
filing date -
May 15, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Information on brain electrical activity is derived from electrical-activity transducers spaced apart over the skull, the information is processed into a time sequence of matrices having elements representing the responses of the transducers, a succession of overlapping running-average matrices is generated each corresponding to an average of a plurality of the matrices in the time sequence, and the running-average matrices are displayed as a sequence of topographic maps. Expanded display matrices are generated from the data matrices by adding new matrix elements using three-point linear interpolation based on pre-stored coefficients corresponding to the location of each new matrix element with respect to the three closest transducer locations.
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