Methods and apparatus for mapping electro-physiological...

Details Methods and apparatus for mapping electro-physiological... Methods and apparatus for mapping electro-physiological...

A - Human Necessities

61

B

354/22, 326/12.6

A61B 5/04 (2006.01) A61B 5/0478 (2006.01) A61B 5/0482 (2006.01) G06F 17/00 (2006.01)

Patent

CA 1325247

Abstract A system for mapping and/or displaying spatio- temporal features of underlying event-related neural activity involves measuring the event-related evoked potential values at a limited number of points over the region of interest, deriving a first grid of potential values at points over the area of interest representing at least a tenfold increase in the number of points by a Kriging-type of spatial statistical interpolation, and using the first grid to derive for the region of interest a second grid of points of current density values by a Laplacian conversion. A plurality of second grids of current density values spaced apart in time are derived and displayed on a monitor in cartoon-type fashion to provide a cartoon- type display of the features of the event-related evoked response over the region of interest varying with time. Various other displays are possible for highlighting specific features.

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