APPARATUS FOR MEASURING BRAIN LOCAL ACTIVITY
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United States of America Patent
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Issued Date -
Apr 17, 2014
app pub date -
Oct 12, 2012
filing date -
Oct 12, 2012
priority date (Note) -
Abandoned
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Abstract
A magnitude of a current component in x direction, y direction or z direction, or a composite current of the current components in x direction, y direction and z direction, estimated from scalp potentials outputted from sensors mounted on a head of a subject, predetermined coordinates of lattice points preset in a standard brain, and predetermined coordinates of the sensors is determined. A normalized power variance (NPV) and its mean value are determined with Fourier coefficients determined from the magnitude of the current component or the composite current. Z-score (or Y-score) of the subject from a mean value of NPV predetermined in the same manner as the mean value and a standard deviation of the NPV for a predetermined normal person group is determined and mapped with contour lines corresponding to the lattice points on a horizontal plane designated.
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